I assume you know this is just an expression, and you know that I know that animals indeed use tools. So I'll refer you to community guidelines https://news.ycombinator.com/newsguidelines.html
Apologies, I had no idea that you used this as an "expression". I have only heard this from people who believed it. Also, I don't think this is a good "expression"; at the very least it's misguided, but mainly it's scientifically constraining.
As for the guidelines, I think I could quote it back at you.
