something that people accept as being true
axiom - truism
An ‘axiom’ is a statement or idea that most understand or accept to be a given truth, though that does not necessarily mean that it is. Essentially, its veracity is assumed to be self-evident and therefore it is generally not considered in greater depth. The word often appears in philosophical discussions and written English, particularly newspaper articles.
It’s a widely held axiom that governments should not negotiate with terrorists, but could compliance actually produce a more favourable outcome?
It has become axiomatic that the company cannot continue without substantial cutbacks.
Axiomatically, it’s assumed that unions have the best interest of workers at heart, but some critics accuse them of being more focused on grandstanding.