>Like if I say "Humans have two feet" some midwit will come along with an article or anecdote about a person who was born without two feet. It's autism. One o

>Like if I say "Humans have two feet" some midwit will come along with an article or anecdote about a person who was born without two feet. It's autism. One of the symptoms of autism is [the inability to recognize sarcasm](http://www.healthcentral.com/autism/c/1443/162610/autism-sarcasm/ http://www.healthcentral.com/autism/c/1443/162610/autism-sar...) without the help of idiotic, illiterate signals like "/s". Your example has the same cause; people who are unable to understand nuance and social cues, whether in real life or in written form.