B.5.RR:4.1 - Say what changed and what is needed now

Compare the earlier question with the present one. State the result needed and the changed condition in terms that can be used in the reasoning. For a calculation, that may be a new range or an input that is now an unknown. For an empirical conclusion, it may be an observation, a changed population or an operating condition.

Distinguish a change in the situation from a correction to your account of it. A measurement taken yesterday can remain a sound report of yesterday while being insufficient for today’s operation. A proposed condition can be explored hypothetically without replacing the account of what has happened.

Keep the meanings of the quantities and claims visible. If the same term now denotes a different quantity, translate the question before substituting its value. If only the spelling or presentation changed and the established application still fits, no reasoning revision is needed.