Led Zeppelin and the Truth of the New Testament Gospels

Wherein I appeal to Led Zeppelin to respond to Bart Ehrman's claim that the titling of the Gospels suggests authorial ascriptions were fabricated

Open your Bible to the table of contents and take a look at the list of books in the New Testament. There, you’ll find the Gospels according to Matthew, Mark, Luke, and John leading the list.

But were Matthew, Mark, Luke, and John really the ones who wrote the Gospels? If so, how do we know?

Your first reply might be, Of course, Matthew, Mark, Luke, and …