[makeitdouble]

> if you are uncertain, don't express the idea

A better interpretation is to express the uncertainty at its core, and not wrapped into your subjectiveness.

For instance if you read it in a publication and kinda agree but don't fully trust it, instead of "I think X" you could go with "Publication Y exposes the possibility of X"

The real point of the advice is to get rid of fluff, not remove nuance or valuable information.