> To be clear, I would expect a moderately intelligent teenager to be able to find two lists and compare them. If an intern gave me the same attention to detail as above, we'd be having a cosy little chat about their attitude to work.

sure, but when I expect this [1] from _any_ full time hire, my "expectations are too high from people" and "everybody has their strengths"

[1] find a list of valid html5 elements, find a list of TLDs, have an understanding of ccTLDs and gTLDs