The phrase 'your guess is as good as mine' is used when one doesn't know the solution or answer to a problem instead of admitting "I don't know or have the solution or answer."
Example of use: I asked my wife "how long will it take for the pie to bake?" and she answered, "your guess is as good as mine."
Interesting fact about Your Guess Is As Good As Mine
No-one knows the origin of this phrase. So your guess is as good as mine. Literally!
