Some alternative future events are referenced to take account of as yet unresolved questions, such as the survival of the human species, the disappearance of the Earth's biosphere, the possibility of the Earth's destruction by the Sun's expansion into a red giant, or the stability of the proton, which guarantees the stability of matter. In mathematics, a primary truth accepted without demonstration is an axiom. Truth has an intrinsic value, without which the virtues that relate to it (the virtues of veracity) could not be maintained within the community, putting it in danger (everyone having the possibility of cheating according to their interests).
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