In 1 and 2, the thinking is not the type being referred to in the quote. In 3, assuming only one of theirs get chosen, then there are 19 failures, hence 19 non-thinkers or non-sufficient thinking. In 4, they're not all trying to answer the same question "what's the best way to make money", but the question "what's a good way to make money". (That may also apply to 3.) I touched on the difference in another thread. In 5, yes, every test-taker should give the correct answer to every question. Obvious for multiple choice tests, and even other tests usually only have one really correct answer, even if there may be more than one way to phrase it.

In 6, first of all, your example is isomorphic to its complement; where 20 people decide not to lynch an innocent man. If you defend the original quote, then some of them must not be thinking. And the actual answer is that my quoted version is one-sided; agreement doesn't imply idealism, idealism implies agreement.

I could add a disclaimer; everyone should be thinking alike in cases referred to by the first quote. I don't have a good way to narrow down exactly what that is off-hand right now, it's kind of intuitional. Do you have an example where my claim conflicts directly with what the first quote would say, and you think it's obvious in that scenario that they are right and not me?