I don't think I'll be able to convince you otherwise, but this would read to most people as two assholes arguing with each other. Also OPs explanation of why UNIX == POSIX was pretty confusing, and I had to look up more information.
Plus, recruiters are incredibly busy this time of year. I don't blame him for choosing not to engage with candidates who reply with a wall of text when given a simple request.
Re:Facebook recruiting and Unix systems
by monktastic1 on Thursday September 07, 2017 @09:25AM
(#15191583)
Would be interesting to conduct a survey among your friends. Seems a lot of commenters here read it as the recruiter being overly strict, and Stanley trying to accommodate him/her while sticking to his integrity.
I'm imagining a recruiter saying "We're looking for someone with graphics programming experience. Your resume says 'OpenGL and DirectX experience.' If you do not have graphics programming experience, I can try to find another role for you." As a candidate, I would think I was interacting with an idiot.