Agnosticism IS the most dishonest position

[Simon Moon]

A person says he thinks there is a 50% chance of a god. There is nothing dishonest about that. 

1. How did you come up with the odds being 50%? Just because a god either exists, for doesn't exist, doesn't mean that it is a 50/50 proposition.

2. That's not agnosticism. Agnosticism is having the position that the existence of gods is unknown (currently), and possibly unknowable.

The person is not a theist or an atheist, he's agnostic. The assertion that one must choose between two options is a black and white fallacy

Agnosticism is not some sort of middle ground between belief and disbelief. Gnosticism/agnosticism concerns what one claims to know, theism/atheism concerns what one believes/disbelieves.

It is not possible to not be a theist or not atheist. Belief is the psychological state in which one accepts a premise or proposition as being true, or likely true. Belief is binary mental state. If one believes a god exists, they are a theist. If one is not convinced that a god exists, they are an atheist.

With regards to the existence of gods, either one accepts the proposition that at least one god exists, which would make one a theist (the belief in a god). Or they do not accept that proposition as being true, which would make them an atheist (without belief in a god). If one says they are not convinced that a god exists, they are an atheist; the "A" prefix means "without" , "theism' means "belief in gods". Atheism means without belief in gods.

There is no requirement with theism or atheism, that one be absolutely certain that a god exists, or does not exist.

Agnostic-atheist is a valid position, as is agnostic-theism.

There is no black and white fallacy.