Jussie Smollett leaves courtroom after pleading not guilty to lying about attack

The transcript contains a brief statement expressing uncertainty.

What do you think the speaker is uncertain about?

How does the phrase 'I don't know' reflect the speaker's state of mind?

What could be the implications of not knowing something in a conversation?

In what situations might someone say 'I don't know, but'?

What might the speaker be trying to convey with the phrase 'but' following their uncertainty?