That logic fails as the concepts are not mutually exclusive. God is not limited by failed man made constructs.
Your weak response could be given for any contradiction.
If Christ is within us at all times, He cannot then be received additionally during the Lord's Supper.
Either/or.
Rome teaches error and contradiction.
Do not confuse them with the facts..Their doctrine also implies that the spiritual is of less benefit than the physical..
"Christ in you the Hope of Glory"..is not speaking of communion..it is speaking of the indwelling Christ....
Either you are saved and therefore have the indwelling Spirit 24/7 or you are unsaved and looking for quick fills of emotional spirituality..
“If Christ is within us at all times, He cannot then be received additionally during the Lord’s Supper.”
He certainly can. Jesus Christ is not limited by the heretical constraints of Jean Calvin.