Uncertainty is information
A witness who says probably may be distinguishing a recollection from a guess. Removing that qualifier can make the account look more confident than it is. Conversely, uncertainty does not automatically make the statement worthless. It helps you assign the claim an appropriate role: a lead to compare with stronger anchors, not necessarily a fixed point from which to build the whole timeline.
Worked example: an approximate visit
A fictional interview says a visitor came around closing time, perhaps Tuesday. Keep both uncertainties visible. A Tuesday receipt may support the day without establishing the time of the visit; a closing log may identify the hour without proving which day the witness remembers. Different sources can resolve different parts of the statement.
Refine only what evidence supports
When a later record narrows one uncertainty, update that component while leaving the rest open. Do not let a confirmed date turn an approximate time into an exact one. In Somatry, this approach keeps the case readable without flattening every source into the same level of certainty. A good note can become more precise in stages, and the unresolved portions show where another comparison would actually improve your understanding.