Here are the sentences categorized as irony or not irony:
Irony:
- Thanks for picking today, of all days, to get stuck for twenty-six minutes.
- “I would never make such a silly mistake.” (This can be ironic if the person ends up making a mistake.)
Not irony:
- Janelle ran the half-block from the subway station to the office.
- “Has the new supervisor come around yet?”
So the sentences that demonstrate irony are the first and the fourth.