CLEAN : Herald Tribune gets new name for digital a

The video briefly addresses uncertainty with a simple statement, 'I'm not sure.'

What does the phrase 'I'm not sure' imply about a person's confidence in their knowledge?

In what situations might someone express uncertainty with the phrase 'I'm not sure'?

How can expressing uncertainty be beneficial in communication?

What are some alternative phrases to 'I'm not sure' that convey a similar meaning?

How might the expression of uncertainty affect decision-making processes?