Truth itself is not relative to believers. Believers are relative to truth. Tolerance is not a matter of allowing what everyone believes to be a “form” of truth. Tolerance is simply not treating others disagreeably if they are in some way different from you. Logic attempts to codify all principles of valid reasoning. It's important to emphasize the inescapability of logic, its undeniable presence in everything we think and say. Logic can either be true or fallacious. When disentangling truth and its adjuncts from insidious falsehoods, there are a few things to keep in mind.

Laws of non-contradiction function in aspects of philosophic thought, and help support sound logic. For example, something cannot be both red and non-red simultaneously. A number cannot be 4 and 5 simultaneously (at least not in our recognizable physical dimension). Too many people nowadays lazily think everything is up for grabs, so to speak, that there are no absolutes, that science or philosophy has somehow worked its way around logic. Not so. We can only reason from the bedrock of a true belief if that belief cannot also be false. The laws of logic are the solid foundation for all thought, impervious to skeptical doubt.