History is full evidence that true scientists have many a times revised their initial assumptions in the quest of truth.

Yes, but true scientists usually apply the scientific method, not drug-induced psychosis, in their quest for truth.

Edit: for people who flagged the parent comment, this is an interesting read http://lesswrong.com/lw/mm/the_fallacy_of_gray/

Hidden in your reply is an assumption that a scientific and reproducible method cannot be applied to spiritual quest. Hypothesis, experimentation and inference are basic steps in a scientific investigation but proving a hypothesis correct/wrong also depends on the instrument used e.g. if one doesn't use microscope one cannot directly show presence of bacterial cells. Similarly to prove that a state of thoughtlessness and beyond exists one cannot use the tools of thoughts, one has to observe by pure attention (without distracting thoughts) the state between 2 successive thoughts as a starting point.

I don't think that article is going to take back your having been personally rude to another user, which is not what we do here.

https://news.ycombinator.com/newsguidelines.html