Ah, I wouldn't say I've lost complete confidence in my statement. Just wanted to add a disclaimer in case I didn't fully remember the details correctly (perhaps

Ah, I wouldn't say I've lost complete confidence in my statement. Just wanted to add a disclaimer in case I didn't fully remember the details correctly (perhaps it isn't all gorillas, just certain species of gorillas. Perhaps the female gorillas aren't entirely infertile, just significantly less so. Etc), as I don't have the book handy to validate.