At first, his resume included "Linux". The recruiter asked him to update his resume to include Unix as well. Stanley changed it to read just "UNIX", but no Linux.
The recruiter asked him to fix this by specifying both Linux and UNIX in his resume. Stanley updated it to say Linux and UNIX-like.
The recruiter, very professionally instead of just dropping the conversation immediately, then asked again that Stanley rectify his resume to include the terms they are looking for: Linux and UNIX. Not "UNIX-like". But Stanley again did not do this.
The recruiter gave very clear instructions on what to do, but (from the recruiter's perspective) Stanley was more concerned with condescendingly educating the recruiter rather than following simple instructions.
I sometimes screen resumes from college students at my company, and if I ever received an email exchange like the one from Stanley here, I would have immediately put him in the "no" pile. I already have 400+ people to screen, why waste time with him when I can easily find someone with equivalent experience that also knows how to follow instructions and, most importantly, isn't so rude about it?
But he did!! And the recruiter still gave him flak!
Stanley said, "POSIX is more-or-less a standardization effort for UNIX/Linux systems, so I've updated my resume to reflect this."
And then he shows a screenshot that just lists "UNIX", not "UNIX-like".
Then the recruiter bats at him again!
I think he was more interested in being as honest as possible, not being right.