A strawman argument is a frequently used tactic in rhetoric and oratory debate. It’s used in business, in politics and Twitter arguments alike. It’s simple and effective. You basically pick an argument of your opponent and rephrase it in a way that makes it easy to refute. Strawman arguments are not real arguments. They don’t even have to be true.
Peter Thiel argues that for decision making, you should really steelman your opponents arguments. If you try to find the strongest and most compelling reasons for your opponents stand, it allows you to improve your side of the argument or even discover flaws in your own reasoning.
The same should apply to valuation. You should always try to steelman the potential risk factors that you apply to your investment thesis.