Noun
Duplicity; insincerity.
Source: Webster's dictionaryNevertheless, their "doubleness" depends only on this optical effect; the stars themselves are distant from one another and share no physical connection. Source: Internet
The artist cannot dispense with the principle of 'doubleness' or 'interplay' because this type of hendiadys dialogue is essential to the very structure of consciousness, awareness, and autonomy. Source: Internet