Greenwall doesn’t argue or imply that the customers have stopped using the equipment. He just points out that many of the customers could be lying about using the equipment.

Greenwall doesn’t make a claim about most people’s personal habits. His statement only addresses the possibility that customers could be lying about using their equipment.

Faden doesn’t make the case that people are less likely to believe a claim as stronger evidence is presented to support that claim.

This is a flaw in Faden’s reasoning. Faden presumes that his argument hasn’t been undermined because Greenwall hasn’t definitively disproved that argument. However, an objection to an argument can hold weight even if that objection doesn’t totally disprove the argument.

Greenwall isn’t concerned with the possibility that some people stopped using their equipment but aren’t embarrassed about it. Greenwall only makes the case that some people may be lying about still using their equipment because they’re embarrassed to admit they stopped.