[amihow]

TexAnglican needs to realize that in the passage he cites from Galatians II, that Peter's actions are not a declaration Ex Cathedra, nor are they a statement from a duly declared (not necessarily called by the Pope) council, nor are they declarations made by the Pope and the Bishops scattered around the world in agreement. Peter's actions are just that, actions and therefore do not come into the realm of infallibility.

[RobbyS]

Infallibility amounts more or less universal jurisdiction and is analogous to political sovereignty. Recalling to me the old notion that the function of the king of a nation was simply to proclaim what had always been law in the nation, in effect formalizing what had been informal.