apodictic

adjective3

1. •
   Incontrovertible; demonstrably true or certain.

   • No religion has ever yet owed its prevalence to ‘apodictic certainty’. — 1902
2. •
   Being a style of argument in which a person presents their reasoning as categorically true, even if it is not necessarily so.

   • Don’t be so apodictic! You haven’t considered several facets of the question.
3. •
   Absolute and without explanation, as in a command from God like "Thou shalt not kill!"