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What two or three tough question can I put to a Landmark sales person that will bother them?
I am looking for tactful questions that will make them think – yes this is a challenging request.
Not all that challenging. Just think for yourself. And if the "salesperson" says something that doesn't make sense to you or raises red flags, just counter it with an intelligent question.
Even if your purpose is to dredge up info to help fellow Landmarkers "handle" probing questions, think what using that technique might do for you!
You might find, once you question things, that what you're trying to do here isn't really worth it. You might find you're able to start thinking more clearly again.
Give it a try. See what happens.