CF

6.1K posts

CF

CF

@SkullScience

Environmental Scientist, PhD. All views my own and not of my associated institutions or employer.

شامل ہوئے Aralık 2011
210 فالونگ242 فالوورز
پن کیا گیا ٹویٹ
CF
CF@SkullScience·
The environmental toxicity of trace metals, the mining process and consequent impact on many third world countries in our aim for EV and Net Zero should not be the sacrificial lamb of our own consumerism and the mass consumption therein. Research required countercurrents.org/2022/08/is-the…
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CF@SkullScience·
@salltweets I can't imagine that the authors of the study (Villotte et al) are particularly satisfied with @xanthaleatham conflating their research into historical traditional gender roles (and ceremonial practices) with gender identity and the modern notion of 'non-binary' self-perception.
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Sall Grover
Sall Grover@salltweets·
Oh FFS.
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CF@SkullScience·
@SwipeWright Clarification on whether the author of this article, @xanthaleatham, was responsible for the headline would be helpful as she appears to misrepresent the study topic of historic gender roles and ceremonial practices therein and conflated them with the notion of gender identity.
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Colin Wright
Colin Wright@SwipeWright·
"Distinct patterns on her toes that indicate a kneeling activity common in men. This discovery...suggests society 'tolerated exceptions and was already experiencing the complexity of identities.'" IT'S 2026. CAN WE STOP THIS NONSENSE PLEASE?
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CF@SkullScience·
@HelenWebberley The studies you cite have long been heavily critiqued for their own shortcomings. Noone et al had only 15 pages with 19 co-authorships, a lead authorship of a person whose PhD is in "Mindfulness". The authorship is replete with those who financially gain from the current system.
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CF@SkullScience·
@kareem_carr I don't think you believe this. Perhaps you are playing Devil's Advocate or you require engagement? A simple test of your "take" on this would be to ask you what is measured on the x-axis of your bimodal distribution and where would you place yourself on this representation?
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Dr Kareem Carr
Dr Kareem Carr@kareem_carr·
My take on biological sex in humans is it’s bimodal, not binary, two overlapping multivariable distributions. Any given trait found predominantly in one sex category will occur with non-zero probability in the other.
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CF@SkullScience·
@ukvillafan @obi_juanita @novaramedia There has been a failure of oversight in the conclusions and semantics therein in this study. The low quality studies implemented in the review should have led to an inconclusive outcome due to lack of high quality data. This should have been flagged at peer review if not prior.
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ukvillafan
ukvillafan@ukvillafan·
Which just goes to prove that you know fuck-all about the source material and the absolute shit show of so-called ‘studies’ upon which this analysis is based. You clearly haven't read past the abstract. Your 'analysis' is built on garbage like Hamilton's rigged comparison (fit young actual women vs. older overweight trans identified males) and Harper's tiny self-reported sample of 8, both of which I referenced in my post. The paper itself rates most evidence as 'very low' certainty via GRADE - high bias, inconsistency, imprecision. The Abstract over-confidently claims 'no advantages!' but the discussion within the paper admits critical gaps, heterogeneous low-quality data, and no direct correlations between lean mass and performance. This is classic misdirection/misrepresentation/cherry-picking for headlines. There are zero elite athletes in any of the 52 studies; the ‘hormone windows’ were extremely short (1-3 years); the analysis ignores muscle memory, bone density, height advantages and other relevant factors such as limb length and organ size from male puberty. You've mentioned fuck-all about the actual flaws: mismatched cohorts, ignored confounders like training history, nutrition, selection bias and biomechanical edges from male puberty. It is perfectly obvious that the analysis is activist-driven, prioritising inclusion narratives over rigorous science. I suspect from the quality of your post that you do not have any form of doctorate or that you obtained one from some online fake college. Thats the most likely explanation for the sheer idiocy on display. If, by some miracle, you do have one from a reputable school, I’d delete your post before your peers see it for the embarrassing pile of nonsense it is. There really is no cure for such demonstrable ignorance and twattery.
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Novara Media
Novara Media@novaramedia·
Transgender women athletes have no advantage over cisgender women, a study in the British Journal of Sports Medicine has found. The researchers found that there was no evidence “to justify blanket bans” on trans women competing in women’s sport and that the data doesn’t support “inherent athletic advantage theories”. The pooled data analysis of 52 studies on 6,485 people considered strength, fitness and body composition of trans women receiving gender-affirming hormone therapy. Trans women were found to have more lean mass (a proxy for muscle), but there were no observable differences in upper or lower body strength, or in a key measure of cardiorespiratory fitness – maximal oxygen consumption – between trans and cis women. The researchers said: “Although the current data do not justify blanket bans, critical gaps in literature were found, notably the under-representation of transgender athletes who may retain more ‘muscle memory’.” They added that more long-term and high-quality studies are needed to “prioritise performance-specific metrics in transgender athletes” but the “scarce number” of trans people in elite sport makes this difficult. The inclusion of trans women in women’s sports has been a key issue for anti-trans campaigners. Last year, the Football Association banned trans women from taking part in women’s football in England, and the England and Wales Cricket Board banned trans women from all levels of women’s cricket. This came after the UK supreme court ruled in April 2025 that the legal definition of a woman under the Equality Act is based on biological sex.
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CF@SkullScience·
@obi_juanita @ukvillafan @novaramedia As someone who has peer reviewed a great many papers, I am somewhat concerned how amendments were not instructed for this study. Collation of a series of low quality studies with self-selection and self-reporting data should preclude definitive statement. x.com/i/status/20190…
Women's Rights Network - WRN@WomensRightsNet

The once-great British Journal of Sports Medicine continues to scrape the very bottom of the junk science barrel in the quest to supports its narrative that males should be allowed to compete in female sports. In the latest issue of the @BJSM_BMJ, a group of researchers from Brazil, have made great effort to twist data to suit their narrative. In a mastery of statistical jumbo-jumbo they reckon that there are 52 studies that support allowing men in women’s sports. We’re not buying it. The only thing this article proves is the old adage that there are lies, damned lies and statistics. ❌ Of the 52 studies reviewed only three were randomised controlled trials (the gold standard of scientific research). ❌ Only 16 studies included an assessment of physical activity - fairly important in a study of athletic ability. ❌ Two of the studies (one by Dr Joanna Harper and one by Dr Blair Hamilton) have previously been comprehensively debunked. Harper and Hamilton are males who say they’re women so you could say they have skin in the game. Harper’s notorious study asked nine male runners if they ran slower after taking oestrogen. Funnily enough all the men said oestrogen had slowed them down and this was the data used to justify the IOC including males in female sports. Hamilton’s study compared young fit female athletes with older, fat, men and lo and behold found the men were slower than the women… ❌ The review included studies of women taking testosterone (a performance enhancing drug) and found to no one’s surprise that they bulked up and sports performance improved. We don’t know how this latest ‘science’ review got through the peer-review process but it should have been spiked the moment it landed on the editor’s desk. It’s business as usual for WRN as we continue to campaign for fair, safe, sport for all females from grassroots to elite level.

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CF@SkullScience·
@Telegraph There needs to be introspection by the @BJSM_BMJ for publishing this. The authors have collated, by their own acknowledgement, a series of low-quality studies with self-selection/self-reporting data and proceeded to draw a conclusive outcome. All involved should be embarrassed.
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The Telegraph
The Telegraph@Telegraph·
🏳️‍⚧️ Trans athletes who were born male have no advantage over women, a British Medical Journal study has claimed. Read the full story here ⤵️ telegraph.co.uk/news/2026/02/0…
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CF@SkullScience·
@sawyeurism @katempadilla Your opening gambit was an appeal to your academic credentials but then you appear to insinuate that those DSD conditions that were previously known as 'Intersex' is somehow a rebuttal to a claim that male and female are the only 2 sexes in humans. This is clearly inaccurate.
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Project Hail Mary saved Sawyer 🌌🚀
I am a published scientist with a Master's Degree in Biology from NYU. I don't care that your favorite uneducated and unqualified podcaster told you that gender is biological. SEX is Biology. The concept of gender belongs to social science. Transphobia makes you look stupid.
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CF@SkullScience·
@james_e_b_ @HelenWebberley Dr. Webberley's premise is a fallacy to begin with as a child's consent is not required for emergency treatment in examples such as chemotherapy or life saving diabetes treatment. This falls under 'Emergency Treatment' in the UK and 'Emergency Exception Rule' in the US.
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Dr Helen Webberley (she/her)
Dr Helen Webberley (she/her)@HelenWebberley·
We trust teenagers to consent to chemotherapy. We trust them to agree to lifelong diabetes medication. But we cannot trust them to understand their own identity? Something does not add up.
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CF@SkullScience·
@HelenWebberley Consent from teenagers and children is not required in the examples you have provided (insulin and chemotherapy) in the UK. Both the parent's and the child's decision can be overruled by the Court of Protection under 'emergency treatment' as you well know. nhs.uk/tests-and-trea…
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CF@SkullScience·
@SwipeWright @JamesLNuzzo Yes, the same Journal (European Journal of Sports Science) also published evidence of pre-pubertal differences between the two sexes in track and field events applying data from the US. This study observed distinct male advantage prior to Tanner Stage 2. onlinelibrary.wiley.com/doi/10.1002/ej…
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Colin Wright
Colin Wright@SwipeWright·
Newborn females exhibit grip strength about 87% that of newborn males. This male advantage is maintained until puberty, at which point it increases dramatically. Puberty amplifies the sex difference, but does not create them from nothing.
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CF@SkullScience·
@JamesEsses I felt compelled to sign this petition due to the flawed methodology applied to the cohorts within the 'clinical' trial. The methodological flaws introduce a high risk of bias which will leave the outcomes open to significant critique and, as such, make the trial conclusions DOA.
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James Esses
James Esses@JamesEsses·
🚨Announcement🚨 Today, I’ve launched a public petition calling on the government to cancel the puberty blockers trial. Let’s demonstrate our strength of feeling by getting this petition to 100,000 signatures and forcing a debate. Please sign and share. petition.parliament.uk/petitions/7518…
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CF@SkullScience·
@StaceyVaughn @SofondaSocks @CrunchAlias @RebeccaRHelm There are details that need clarification. You are incorrect when you state that sex is bimodal. You are conflating sex with sex characteristics. Helm is using a semantic sleight of hand in this quote. She states that sex is "caused" (determined?) by chromosomes not "defined".
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Stacey Vaughn
Stacey Vaughn@StaceyVaughn·
Unfortunately her X account is now private so I cannot share the original post, but here is a great read from a biologist on sex: The biological root of sex? (Twitter Post) Written by @RebeccaRHelm on Twitter 12/19/19 Friendly neighborhood biologist here. I see a lot of people are talking about biological sexes and gender right now. Lots of folks make biological sex sex seem really simple. Well, since it's so simple, let's find the biological roots, shall we? Let's talk about sex... If you know a bit about biology you will probably say biological sex is caused by chromosomes, XX and you're female, XY and you're male. This is "Chromosomal sex" but is it "biological sex"? Well .. Turns out there is only ONE GENE on the Y chromosome that really matters to sex. It's called the SRY gene. During human embryonic development the SRY protein turns on associated genes. Having an SRY gene makes you "genetically male". But is this "biological sex"? Sometimes that SRY gene pops off the Y chromosome and over to an X chromosome. Surprise! So now you've got an X with an SRY and a Y without an SRY. What does that mean? A Y with no SRY means physically you're female, chromosomally you're male (XY) and genetically you're female (no SRY). An X with an SRY means you're physically male, chromosomally female (XX) and genetically male (SRY). But biologically sex is simple! There must be another answer... Sex-related genes ultimately turn on hormones in specific areas on the body, and reception of those hormones by cells throughout the body. Is this the root of "biological sex"?? "Hormonal male" means you produce 'normal' levels of male-associated hormones. Except some percentage of females will have higher levels of 'male' hormones than some percentages of males. Ditto ditto 'female' hormones. And... ... If you're developing, your body may not produce enough hormones for your genetic sex. Leading you to be genetically male or female, chromosomally male or female, hormonally non-binary, and physically non-binary. Well except cells have something to say about this .. Maybe cells are the answer to "biological sex"?? Right?? Cells have receptors that "hear" the signal from sex hormones. But sometimes those receptors don't work. Like a mobile phone that's on "do not disturb'. Call and cell, they will not answer. What does this all mean? It means you may be genetically male or female, chromosomally male or female, hormonally male/female/non-binary, with cells that may or may not hear the male/female/non-binary call, and all this leading to a body that can be male/non-binary/female. Try out some combinations for yourself. Notice how confusing it gets? Can you point to what the absolute cause of biological sex is? Is it fair to judge people by it? Of course you could try appealing to the numbers. "Most people are either male or female" you say. Except that as a biologist professor I will tell you... The reason I don't have my students look at their own chromosome in class is because people could learn that their chromosomal sex doesn't match their physical sex, and learning that in the middle of a 10-point assignment is JUST NOT THE TIME. Biological sex is complicated. Before you discriminate against someone on the basis of "biological sex" & Identity, ask yourself: have you seen YOUR chromosomes? Do you know the genes of the people you love? The hormones of the people you work with? The state of their cells? Since the answer will obviously be no, please be kind, respect people's rights to tell you who they are, and remember that you don't have all the answers. Again: biology is complicated. Kindness and respect don't have to be.
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Sam Morgan
Sam Morgan@CrunchAlias·
“Trans activism” is the insane idea that some men lie about being women, and some men tell the truth about being women.
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tontondclat@tonkatonkadc·
@SkullScience @ForWomenScot @washingtonpost So any male athlete can win a female championship just because of their sex? Is that what you’re saying? I don’t know this kid’s story or life, whether he started puberty blockers early or late, and I don’t care. I’m not in the habit of digging into strangers’ private lives.
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The Washington Post
The Washington Post@washingtonpost·
Verónica García is a transgender athlete who won the girls high school 400-meter championship in Washington state — twice. Her success did not come with any perks. Instead, she was subject to abuse from people who oppose transgender women participating in women’s sports. wapo.st/4qziWp7
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CF@SkullScience·
@tonkatonkadc @WesWarner11 @washingtonpost Could you link the footage? There are stills but the bout itself was deleted at the behest of Golden Boy Promotions as they deemed the footage of a male knocking out a female "too graphic for our audience". Unlike the rest of the event with gender matched fights all available.
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tontondclat
tontondclat@tonkatonkadc·
@SkullScience @WesWarner11 @washingtonpost Lmao yes kiddo! The world is conspiring to not show you a knockout. I mean, I found it in 5 seconds but I guess it has been deleted from your search engine. 😂🤡
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CF@SkullScience·
@tonkatonkadc @WesWarner11 @washingtonpost It's ironic that despite the bout being broadcast on Oscar De La Hoya's Golden Boy Productions, all footage of the fight with Joshua Reyes, in which Manuel was knocked out in 21 seconds, has been scrubbed as knockout was deemed "too graphic". I guess they do know what a woman is.
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CF@SkullScience·
@tonkatonkadc @ForWomenScot @washingtonpost You appear not to understand. Your niece improved her performance to win the state championship against other females. Garcia, having times putting them in the lower percentile of male athletes, was fast enough to become female (not male) state champion. This is not improvement.
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tontondclat
tontondclat@tonkatonkadc·
@ForWomenScot @washingtonpost My niece went from 300ish to winning state championship and she always has been a girl. Is it suspicious she improved?
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CF@SkullScience·
@cmwilliams99 @ForWomenScot @LWDScotland Sex is not defined by phenotypic characteristics alone. Sex determination via observion of phenotype at birth is a proxy due to the highly correlated accuracy of this observation. This is not a definition of sex. You appear to be confusing 'determination' with 'definition'.
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Callum Williams
Callum Williams@cmwilliams99·
@ForWomenScot @LWDScotland If you want my definition of biological sex - an individual who at birth has the phenotypical characteristics of a female. But scientific definitions are not the answer for these questions, as they are societal. FWIW I think a trans women is a women.
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CF@SkullScience·
@MorphoTime As an academic, I think it is only the right thing to do to correct the record when you have misspoke or have been misinformed. You clearly mischaracterised the case of the Guevedoces and those born with the DSD 5-ard. There is no condition in which ovaries change to testicles.
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