Why do Muslims say that islam has a monopoly when it comes to the absolute truth?
Muslims mostly base this on the fallacy that it has a large following. The truth is that intellectual Muslims are questioning the tenents of Islam and leaving it in huge numbers and only the ignorant and the terrorists are remaining steadfast. This logical fallacy is called argumentum ad numerum. This fallacy consists in asserting that the more people support a belief or a proposition, the more likely it is that that proposition is correct. This is of course a fallacy because truth can never be attained through the consensus of the majority. Prior to Copernicus and Galileo everyone agreed that the Earth is flat and the universe is geocentric. This consensus of virtually everyone did not make this belief true. Another version of this fallacy is Argumentum ad populum. You commit the fallacy when you claim a belief is true because it is popular, like saying thousands of people convert to Islam so it must be true.
