Idiom
The detective left no stone unturned to trace the culprit.

did very irrelevant things
resorted to illegitimate practices
took no pains
used all available means

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Idiom
Women should be paid the same as men when they do the same job, for, surely what is sauce for the goose is sauce for the gander.

Both goose and gander should be equally treated
What is thought suitable pay for a man should also be for a woman
The principle of equal treatment should be implemented
Goose and the gender eat the same sauce

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