The person who lets you revise an answer has made honesty easier than consistency.

Being held to your first answer teaches people to defend rather than think. If changing your mind will be treated as unreliability, the safest move is to keep repeating the position you took before you had all the information. Someone who says it is fine to update removes that trap, and what you get back is a truer answer rather than a consistent one.

Offer that option out loud: tell people they can come back and change what they told you. When someone does, thank them instead of noting the discrepancy. Do the same for yourself when a new fact arrives.