You lept straight from "Sometimes these mental tools produce correct results" (which is true) to "These tools are the only way to produce correct results" (a ridiculous distortion).
Those aren't mutually exclusive. Something can do something only sometimes, and also be the only way to do that thing. If he/she is wrong, It should be easy to prove that their claim is incorrect though by thinking of a counterexample
Those aren't mutually exclusive. Something can do something only sometimes, and also be the only way to do that thing. If he/she is wrong, It should be easy to prove that their claim is incorrect though by thinking of a counterexample