Resolve
Resolve[expr] attempts to resolve expr into a form that eliminates ForAll and Exists quantifiers.
Resolve[expr, dom]works over the domain dom. Common choices of dom areComplexes,Reals, andBooleans.
Examples
Resolve[Exists[x, x^2 == 4], Reals]Resolve[ForAll[x, x^2 >= 0], Reals]Please visit the official Wolfram Language Reference for more details.