Linda Fisher (“Katie Britt, when will you feel shame?”, Nov. 16) thinks President Trump is worse than bad by authorizing the killing of alleged drug smugglers. And that Senator Britt should feel shame for supporting him. She cites Charles Schwab’s “sunk cost fallacy” to support her broadsides: “the irrational idea that you should keep investing in something just because you’ve invested time and money in it.”

To unpack her arguments, we start with a simple observation: if you want to stretch a financial principle to politics, you need to understand the principle to begin with:

Schwab’s principle is predicated on hard historical evidence that a financial investment has proven not to be beneficial. A correct application of that principle here would ask: how beneficial has our country’s i

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