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Phrase Meanings » you never can tell
What does "you never can tell" mean?
Also,
you never know. Perhaps, possibly, one can't be certain, as in You never can tell, it might turn into a beautiful day, or You may yet win the lottery—you never know. The first term uses tell in the sense of “discern,” a usage dating from the late 1300s; the variant dates from the mid-1800s.