adducing facts selected to show that the architect's conclusion is false disputing the accuracy of the evidence that the architect cites in support of the conclusion using the evidence cited by the architect to draw an alternative conclusion showing that the architect's argument is internally inconsistent
Architect: Obviously, a dirty stone building is less attractive than a clean one. But the process of cleaning stone buildings with water drives the water deep into the stone, eventually causing irreparable damage. Dirt also damages stone buildings, but less than water does. So I am afraid stone buildings must remain dirty if they are to last as long as possible. Engineer: Not so fast. Advances in technology make it possible to clean stone buildings without water, using mild chemicals that do not penetrate the stone.
The engineer responds to the architect by doing which one of the following?