Can you find the pattern? ■□□■ → ▣ ■□■■ → □ □■□■■ → □ ■□■■□■ → ▣ ■□■■■□■ → ▣ ■■■□■■■ → ▣ ■□□□■■■ → □ ■□■□□■■■ → □ □■■■□■■■□ → ▣ ■□■■□□■■□■ → ▣ ■□■■□□■■□■■ → ?

@fchollet a colleague of mine came up with this using GPT-4 and it gets the final answer right... and the reasoning is quite convincing... until you see the flaw: chat.openai.com/share/e697ee16…...