truism

/ˈtruːɪzəm/
noun
  1. A statement that is obviously true and says nothing new or interesting.
    • It's a truism that practice makes perfect, but that doesn't make it any less true.
    • Although it sounds like a truism, 'you get what you pay for' is worth remembering.
    • The speaker filled his speech with truisms like 'hard work leads to success.'
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