[robot_no_419]

Actual, deductive logic can't be used in any scientific field because we don't have scientific objective truths. Science is based on inductive reasoning and constant hypothesis checking. Plenty of scientific facts we once thought were "true" ended up being false such as Newton's laws of gravity. The only place where true deductive logic really has a use is philosophy and pure mathematics, which are completely abstracted from reality. The laws of physics as we understand can always be overturned at some point; the laws of mathematics cannot.

My argument was that any rational person should be able to conclude it's a scam. That's really the extent of my willingness to engage further.

[beebmam]

You do not need objective truths to use deductive logic. That statement shows that you fundamentally misunderstand deductive logic.

You simply need premises (i.e. assumptions) to make use of deductive logic in a standard logical system. Those premises, when used with logic that has no fallacies, implies conclusions. Any real world conclusions are always based on premises, where those premises are based on experimental evidence. It's always the case that there could be problems with the experiments, and there always are limitations of those experiments. That doesn't mean you can't use logic to derive conclusions.

[robot_no_419]

You know what? You're 100% right and I agree with you. I am wrong here. But still by your definition of logic, anyone can logically conclude it's a scam. Just make the assumption that people don't give out money for free, which is a valid assumption to make given most people's experience with the world.