If by intelligence you mean something along the lines of information processing/synthesizing ability, then intelligence has been shown (hedging- strongly sugges

If by intelligence you mean something along the lines of information processing/synthesizing ability, then intelligence has been shown (hedging- strongly suggested) to be dynamic as the result of neuroplastic brain events. Assuming you believe some version of the brain = mind identity theory (otherwise, your intelligence may not depend on physical events and my example fails).