Zachary: The term fresco refers to paint that has been applied to wet plaster  Once dried, a fresco indelibly preserves the paint that a painter has applied in this way  Unfortunately, additions known to have been made by later painters have obscured the original fresco work done by Michelangelo in the Sistine Chapel  Ttherefore, in order to restore Michaelangelo' s Sistine Chapel paintings to the appearance that Michelangelo intended them to have, everything except the original fresco work must be stripped away
Stephen: But it was extremely common for painters of Michelangelo' s era to add painted details to their own fresco work after the frescos had dried
denying the truth of one of the stated premises of Zachary's argument