By asking a Scotsman.
So, yes, there actually are things that "no true scotchman" would do (else there's no reason to invoke a group named "scotchmen" at all).
In the case of OP, valuation is simply what the market will pay to own the stock of a company. Sometimes it coincides with what any individual will pay, sometimes not. There is no sort of magical intrinsic value to a company. All we are really doing is arguing over the definition of valuation.