[Natural Law]

"Agreed. Luther and Calvin like the Pope are humans and are known to error, which is precisely why we hold the Bible as truth."

Humans are ALL known to err. The problem I have with Protestantism is the defacto sixth Sola, "Sola Puto" (ut quod ego unus sumo ut puto) doctrine which means "that which I alone choose to believe". It recognizes the error in all others but retains for itself some special ability to personally infallibly interpret Scripture while denying that ability to Catholics.

[Vegasrugrat]

There are 5 solas:

Sola Scriptura—by Scripture alone
Sola Gratia—by grace alone
Sola Fide—by faith alone
Solo Christo—by Christ alone
Soli Deo Gloria—glory to God alone

I do not have any special ability to interpret scripture and I do not believe any human has/had an infallible ability to interpret scripture.

I believe you have me confused with a Catholic, for they believe their Pope is infallible and the only reliable source for interpretation.

God Bless