Me, still in university, trying to tell 3 graduates (all computer science grads) what a “data exception error” in COBOL was.

Unless it’s a ball-peen hammer.

Another example is “Don’t work overtime, the taxes cost more than you make.”

Unless your marginal tax rate for your overtime is > 100%, that’s simply false. Given that all marginal income tax rates in the US are < 100% (that I know of).