For example: Some people believe that money will motivate anyone to do things (both legal and illegal acts) they would never do and they will argue this, regardless of the circumstances. However, that logic would also apply to them. By assuming we are conditioned psychologically to collect things that leads to a reward, then they inadvertently included themselves into the equation for which they cannot omit from. If they do, then their conclusion must not be true.

If I use this technique (reductio ad absurdum) and take a person’s argument to its logical extreme would this be my only solution to reasoning?

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    If a speaker is claiming is true for all people but is excluding himself rationally he can’t be correct. Perhaps the tone he is using is authoritative as in do as I say because. . . . You would have to ask what he means precisely. If he says all people and you ask him something he will not do for money then he is the counter example and he is wrong. – Logikal May 27 '20 at 20:48
  • Colloquially, "everyone does so" or "everyone knows" does not literally mean "everyone", it only means that it is typical. So your strategy would not work. To refute such claims something much more complicated is needed, a broad statistical study that finds claimed behavior to be atypical. It is much easier to challenge a claim than to refute it, ask how they know that what they claim is typical, let them cite statistical studies if there are any. – Conifold May 28 '20 at 2:24
  • You can't really use logic on things like this. Instead you must use the scientific method applied to statistical inference. You would need something like a Gallup poll. – polcott May 30 '20 at 15:56

No, it is not your only option.

In order to prove that people are not generally conditioned to do everything for money, it is not necessary to show that the person who makes that claim would not do everything for money. It is enough to find any counterexample(s).

It is an unnecessarily strong claim anyway. But it is empirically certainly interesting how far people go for money. The discipline of behavioural economics is academically dealing with this topic.

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