I'd also like to reiterate my point about objectivity and relativity - that is, that neither can apply to everything. It's important to keep that in mind.
Also, just to keep the discussion moving, an example of something that's true but not always accepted is that vaccines are very safe.
Not all vaccinations are what they say they are. People have died form vaccinations. Doctors will tell you that anything is safe as long as it fills their pockets with cash.