The creative literalness of the words: This is my body; this is my blood must be believed.
Creative literalness?? Is that one of those fundamental principles of hermeneutics???
According to those fundamental principles, by the word "This" Jesus meant the bread that He was holding in His hands right there at that moment -- no more and no less -- not the bread that others would hold in remembrance of this occasion at other and later places and times.
"This" bread in His hands in front of Him at that moment means "This" bread in His hands in front of Him at that moment, no more no less, unless you think that by "This" He meant something other than "This", in which case there goes your fundamental principle of a literal hermeneutic.
The earliest Christians believed it; their true descendents believe it to this day. This bread is His Body. I accept the faith of the Fathers.
The Reformation brought about the great effort to get rid of the Real Presence doctrine, led by Zwingli. Calvin actually was less extreme than Zwingli here. Zwingli in 1527 led the first major redefinition of the doctrine to include the term signify.
Creative literalness??
Yes, that "creative literalness" allows Rome to redefine things when it suits the present agenda.