changing your mind isn’t foolish. It just means you’ve learned something new. Everyone changes their mind sometimes, as they should, or else they’re just, I don’t know, stubborn and ignorant. Moving water is healthy; stagnant water is sickly. Tainted.”
This is a good concept in general, but Effy didn't say changing her mind was what made her foolish. She just said her aggressive behavior towards Preston was foolish—and it was!
What is he even talking about? AVA, wtf.

