The main difference between Dr. Marshall and people tha just dismiss science because every once in a while science was wrong is that Dr. Marshall made his exper

The main difference between Dr. Marshall and people tha just dismiss science because every once in a while science was wrong is that Dr. Marshall made his experiment, the experiment was replicated, the evidence seemed solid enough to end the dogma and it spread among scientists. The scientific community didn't burn the guy at a stake but gave him the highest recognition. Before the proof, Marshall and Warren had little more than a suspicion (not enough to topple an accepted theory). Their first H. pilori cultures were in 1982, with little success. Their results of the famous bactery drinking after giving up the culture experiments were published in 1985, only three years later. It's not realistic for a scientist to expect a theory to go away because you have a hunch, even if that hunch turns out to be correct! If anything the Marshall experiment show that in science you can go against the main theories and turn them around if you have proofs. That's very different that something like "I don't believe in evolution because this sacred book written thousands of years ago says otherwise".