Novikov self-consistency principle

== English == === Etymology === Developed by Russian physicist Igor Dmitriyevich Novikov in the mid-1980s. === Proper noun === the Novikov self-consistency principle (physics) A conjecture asserting that it is impossible to create paradoxes by time travel because the past cannot be changed. Synonym: Novikov self-consistency conjecture === See also === Polchinski's paradox