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general::
Phrase(s): (It) just goes to show (you) (something).
That incident or story has an important moral or message. • Tom: The tax people finally caught up with Henry. Sally: See! It just goes to show. • Angry at the young grocery clerk, Sally muttered, "Young people. They expect too much. It just goes to show you how society has broken down."
McGrawhill's American Idioms And Phrasal Verbs