Four killed in car bombing as wave of deadly blasts rock the capital

The transcript contains a brief statement, 'No, I'm not.'

What do you think the speaker means by saying 'No, I'm not.'?

In what context might someone respond with 'No, I'm not.'?

How does the phrase 'No, I'm not.' reflect the speaker's feelings or attitude?

What could be the possible reasons for someone to say 'No, I'm not.'?

Can you think of a situation where saying 'No, I'm not.' would be appropriate?