It's called common sense, drawing conclusions that are warranted by the evidence, etc. For example, when Peter said on the Day of Pentecost "Repent and be baptized in the name of Jesus Christ for the remission of sins", if I am thinking and reasoning correctly, I don't believe I have to go too far in my "interpretation". I simply have to believe that Peter was not lying, and obey it. (This is not meant to stir a debate on baptism, but rather to serve as an example). It's not what I "interpret" that is the source of my salvation, but rather what God said.
or that it doesn't teach certain doctrines. Like what? Like...
Papal infallibility
the Perpetual Virginity
Transsubstantiation
Infant Baptism
Other men serving as your priest
Mary as Mediator
etc etc ad nauseum.
According to your interpretation, not Christ's Church. I wonder how you interpret John 6:50-58...