How is the truth determined? By majority? That is the claim of many who say, as Jovaro has done on p. 3 of the bad back post, that because the majority of scientists (or anyone else) believe something it must be true.
The number of times the majority of professionals in any given field has been wrong, historically, would exhaust this page and a number of others.
Truth is not determined by majority. It is determined by what is. By the actual data. When the data is too scarce to determine what is actually true, the fact that a majority of anyone thinks the data supports their favorite theory does not make that theory true.
"Truth:" The earth is 4+ billion years old.
Data points toward: Not necessarily
"Truth:" Evolution is a fact and has been proven.
Data points toward: There is no known data which supports macroevolution (bacteria to bears) genetically.
"Truth:" The universe is still expanding
Data points toward: Very possibly not
It is VERY important to look at the data yourself and think for yourself and not spend your life either simply challenging/arguing with people who disagree with you or blindly accepting what you are told to accept and think what you are told to think.
Look for the truth. Everything you are and can become depends on it. Truth is not relative. It is there despite what anyone may think or feel.