A trustworthy person distinguishes what they know from what they assume.

Much of trustworthiness is a habit of labeling. Knowing something, having read something, having inferred something, and having a hunch about something are all different, and running them together is the most common way honest people mislead others. The distinction is easy to make and it is usually skipped because it makes the statement less forceful.

Add one phrase to your speech this week, some version of that being what you think rather than what you know. It costs a fraction of a second. It also means people can rely on the parts where you did not add it.