No, you're wrong. This is from the Wiki on irony:

Verbal irony and sarcasm:

A fair amount of confusion has surrounded the issue regarding the relationship between verbal irony and sarcasm. Fowler's A Dictionary of Modern English Usage states: Sarcasm does not necessarily involve irony and irony has often no touch of sarcasm. This suggests that the two concepts are linked but may be considered separately. The OED entry for sarcasm does not mention irony, but the irony entry reads: A figure of speech in which the intended meaning is the opposite of that expressed by the words used; usually taking the form of sarcasm or ridicule in which laudatory expressions are used to imply condemnation or contempt.

Good try though, genius. By the way, the sentence previous to this was sarcasm.