Identifying false religions.

One thing that really seems quite amazing to me is the number of religions/cults that claim to worship the one and only 'true' God. Surely they can't all be correct, according to the bible there is only one God (Exodus 20:1-6)What steps would you take to identify a false religion?

Thanks for the replies all, very interesting read.Regarding Dr. Sings analysis..If we take the statement from AZ as a factual claim and apply it to what Rahvin was saying We can see that "'my' conception of God" cannot be evaluated against reality... correct?To then take something that cannot be evaluated against reality and then evaluate it against another claim that cannot be evaluated against reality (i.e. another religion), what do we end up with?A bit of a muddled head if you ask me!Edited by killinghurts, : example

And how do we determine if it is invented by man?

I'll assume there's some non-literal translation you are trying to convey with that passage, as it is merely a story about a man who makes a cooking fire and uses the left over wood to make a carved image of god to worship (which is, apparently a bad thing according to the Bible and should be punishable by death).So back to my original question, how does this allow us to determine if a religion is invented by man?