Credibility is damaged when certainty becomes a performance.

There is certainty that comes from knowing and certainty that is put on because doubt looks weak. People can tell the difference more often than the performer expects, and the moment one confident claim collapses, the whole style becomes suspect. Performed assurance is a loan against a future you may not be able to cover.

Watch for the moments when you firm up a statement because the room wants firmness. Try giving the honest degree of confidence instead. You will be right more often, and being right will count for more.