frankly, this strikes me as obvious, and i can't fathom how anybody could think we're born with a specific amount of intelligence. that doesn't even strike me as worth testing for, that strikes me as fundamentally clear.

but, what the "we are born blank and can change" people are really up against are the christian snowflakes, the ones that think god made us all unique and variation is an expression of divine will. that is not the debate in the literature, but perhaps it ought to be, because it's what it really is.

if you take a step back from that for a minute, the idea that you're born with a specific iq, or a specific weight, or a specific height, ought to be considered ridiculous. it just doesn't make any sense, intuitively.

and, even eye colour changes, too. mine have been blue, green and brown at various points.

https://www.thegreatcoursesdaily.com/plasticity-its-time-to-rethink-the-notion-that-intelligence-is-fixed/