Strips

Reply from PHB: "What's a link?"

Sarcasm is lost on the feeble minded.

@Labreck: Dilbert is certainly using sarcasm. Your alternative would be ironic, but probably not sarcastic (not cutting enough).

Wally, of course, is the master at sarcasm!

Dilbert could be naive, but actually, the Internet did screw up pretty badly sarcasm. Before, you had to use your voice and anyone stupid enough to not understand you deserve it. Now with the overload of information, and the finesse it take to deduce intonation from a text, that just doesn't cut it. People want to read direct information and work as little as possible. We are probably entering an area of credulity where sarcasm and irony would be the humour of the smartest only.

And I would add, if you have to say something directly to insult the other, that ain't sarcasm, that being condescending. A better fit sarcasm would be in the form (for second case): "As I know you know very well the definition of this word, I didn't need to emailed you a link with its definition"