Well, Catholics claim that you have to eat the real flesh and drink the real blood of Christ.
They also claim that He did so and His disciples did so at the Last Supper.
They claim that He turned the wine and bread into actual flesh and blood.
At the very least, one would expect what the priest serves the parishioners would be literal, real flesh and blood.
Looking like it would be a start.
No on all accounts of the blood and flesh. By “real” we mean real in substance and as in the “Real Presence.”
If we are in error, it is an error that goes back to Jesus first teaching of it to his disciples (the ones that stayed after he told them). And it goes back to Paul’s admonitions to the Corinthians, continues in Acts, in the earliest documents we have of Christian practice and all the way up to and through Luther.
That this is an error started, in fact, some time after the Reformation.
The Holy Eucharist was instituted by Jesus, practiced by his Apostles and His Church and continues to be practiced today.
The “error” of the Real Presence is a relatively recent innovation.
I'm assuming by this you mean having the accidents of blood and flesh rather than wine and bread. If you know or have been taught what we believe about transubstantiation and the Holy Eucharist, why would you expect that.
If we were taught what you think we believe, don't you think we would expect what you expected - and notice?
What's the difference between a gold ring and a wedding ring? Is the difference "real"? Is the difference measurable?
Is justice "real"? Is Love "real"? how much do they weigh, what color are they, what do they smell and taste like?
When you die, will the dead body be "really" you? Is what makes you you "REAL"? How much does it weigh?
The other day, somebody committed murder. On the same day, somebody killed a man in self-defense. Is the difference betweeen self-defense and murder 'real'? How much does it weigh and what does it taste like?
The other day, a father kissed his daughter goodnight. A child molester kissed a little girl. Is there a REAL difference between those acts? What color is it?
Some think "real" means "material", except when they don't think about it. When they don't think about it, they know perfectly well that there is a 'real' difference between murder and self-defense.
But in an instant, is seems, they forget what 'real' means.