Universal instantiation is a rule in first-order logic that allows for the conclusion that a property holds for an arbitrary individual from a universally quantified statement. When we have a statement like $$orall x P(x)$$, this rule lets us deduce that $$P(a)$$ is true for any specific element 'a'. This concept is foundational for moving from general assertions to specific cases, making it crucial in constructing proofs and reasoning effectively.
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