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1. A religious doctrine that is proclaimed as true without proof
   - dogma
    
2. A key principle, belief or assumption (or a theory, model, etc)
   "one of the main tenets of the marketing concept is that customers are usually happy to pay a little more for something that works really well for them"

Derived forms: tenets

Type of: church doctrine, creed, gospel, religious doctrine

Encyclopedia: Tenet, George