warpus
Sommerswerd asked me to change this
but because they have a valid model of conciousness that either precludes or entails an afterlife.
One thing that you're forgetting is that after you've built a model, you need to test it to see if it actually works and is a good model of reality. Otherwise you might as well just be making things up as you go along - not paying any attention to reality. And that will obviously never get one anywhere.
No such models (that include an afterlife) have ever been tested successfully, to my knowledge, although I do know of cases of where people have tried. That's why the sensible thing to do is to dismiss them, until the next stage in verifying them has been reached somewhere, by someone.
Not all models are built equal. Some are actual attempts to mirror the world in some way - while others are based on nothing but speculation or wishful thinking. It doesn't make sense to treat them on an equal footing - some are basically "just ideas", while others are actual attempts to approximate reality.