4 billion

I am using the flat World idea, as an example of how a large number of people's belief can be wrong. As once, a large percentage of Humans believed the world to be flat. People believe Islam and Christianity to be different religions, and I am saying all these people are wrong.
I would say that the belief of the Earth being globular is a central tenant of Humanity's belief. No matter what religion. Find me somebody who still believes the Earth to be flat. The Church believed the Earth was flat at a certain time, so you cannot say the flatness of the world has nothing to do with beliefs.

Can you think of a word that describes the practice of religion?

I believe there is no god, as I know god is impossible.

ps what is communication, but word play?

knotted paragon

Perhaps those people who knew the world was flat knew that fact in the same manner that you know these things:

4 billion

Yes, funny, that thought just crossed my mind.
As one could say, I believe Astronomy to be true, this is a reasonable understanding of Astronomy, or for that matter science.
This understanding though starts to lose some of it's gloss, if one is being vaporised by a nuclear bomb, or in line, for life saving, Medical science.

Dryhad

And you are right. A large number of people can in fact be wrong. However, if their belief directly affects the subject, then they will not be. In this case, both Christians and Muslims believe that the two religions are different. Since religion is simply a reflection of its adherants' beliefs, the two religions are different. Because they believe it to be.

But they can't be wrong! Their belief is a tautology. It's up to them whether or not the religions are the same, and they choose no. Picture a dictator who has ultimate power over his country. He says "I believe that wearing odd socks on a tuesday is illegal". Henceforth in that country it is illegal to wear socks on a tuesday. The dictator's beliefs directly affect the laws in the country. See?

You're not listening to me! Even when people thought the world was flat, it wasn't! The world's flattness cannot be altered by beliefs alone. Beliefs, however, can alter each other.

In what context do you ask this?

Wordplay to strict rules. Rules which your wordplay bent.