post-truth

Short definition from Wiktionary

Adjective

1. 1
   Beyond or superseding the importance of truth; pertaining to an era or situation when truth is no longer significant, relevant, or expected; (usually derogatory) not caring about factual accuracy.

Noun

1. 1
   The fact or state of being post-truth; a time period or situation in which facts have become less important than emotional persuasion.