For the most part you get people thinking AGI isn't possible because of souls/ethereal magic. If pressed on this, they'll tend to deflect to "um quantum physics".

I'm of the mind is there is likely many was of simulating/emulating/creating intelligence. It would be highly surprising if there was only one way, and the universe happened to achieve this by the random walk of evolution. The only question for me is how much work is required to discover these other methods.