Internal Critique of Transubstantiation

[RamistThomist]

Would this work?

Rome's definition of a sacrament contradicts its teaching on transubstantiation.

It defines sacrament as "a symbol of a sacred thing" (Thirteenth Session, chapter 3). According to the doctrine of transubstantiation, the brad and wine are not signs or symbols of sared things; they are the sacred things...But if they are actually the very body and blood of Jesus Christ, then they cannot be signs of symbols of the body and blood of Jesus Christ, and if they are not signs and symbols of the body and blood of Christ, then they are not sacraments by Rome's own definition of a sacrament!

Mathison, Keith. Given for You, p. 244, 245.