The first moment of existence of a thing, whether living or not. The concept of the big bang theory, at the instant it happened, represents the instantiation of the universe.
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When instantiation is implicit, it is not obvious when it occurs, for example, whether it occurs when the exception is raised or when it is caught.
Code which instantiates explicitly would not be affected, since the run-time checks necessary to determine whether to issue a warning are exactly those which are needed to determine whether to instantiate implicitly in the first place.
Code which instantiates implicitly would incur a large cost: timing trials indicate that issuing a warning (whether it is suppressed or not) takes about five times more time than simply instantiating, raising, and catching an exception.
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