GHSTHA wrote:

Papal infallibility is a doctrine of demons. Scripture is perfectly clear on that matter;

Yes it is clear on this. Here is what the Lord said on the matter.

Matthew 16:19 - I will give you the keys of the kingdom of Heaven: whatever you bind on earth will be bound in heaven; whatever you loose on earth will be loosed in heaven
Hm...there doesn't seem to be any reference to any "pope", to any future popes, in that.  Not only was Peter not a pope, but that was not speaking of any succession.  Not any indication at all of any succession.