Problem: Sentence1: The cognitive operation of remembering.
Sentence2: That rule is no longer in operation.
Q: Does the term operation mean the same thing in both these sentences?

Answer: different meanings

Problem: Sentence1: As you sow, so shall you reap.
Sentence2: When I had sown the field, the day's work was over.
Q: Does the term sow mean the same thing in both these sentences?

Answer: the same meaning

Problem: Sentence1: The set of prime numbers is infinite.
Sentence2: The set of his mind was obvious.
Q: Does the term set mean the same thing in both these sentences?

Answer: different meanings

Problem: Sentence1: The village fool threw his own shoes down the well.
Sentence2: You were a fool to cross that busy road without looking.
Q: Does the term fool mean the same thing in both these sentences?

Answer:
the same meaning