Lance Armstrong... greatest doper there was or ever will be

This looks very carefully worded

Armstrong representatives have since issued a document attacking Anderson’s credibility, saying he is a disgruntled former employee and that Anderson never observed Armstrong commit an illegal act, was never requested to perform an illegal act, and never observed Armstrong ingest any prohibited substance

http://velonews.competitor.com/2011/02/news/interview-former-armstrong-assistant-ashamed-of-working-for-him_158382

In the context of former mechanic not claiming to have observed Armstrong committing an illegal act, or being requested to perform an illegal act, or to have observed Armstrong ingest any prohibited substance. Why didn't they want to deny in black and white that the former mechanic found proscribed substances in Armstrong's bathroom, which seems to be the main substantial claim? Looks like formulaic lawyerese - deny all the wrongdoing that you have neither done nor been accused of, and do it loudly and at length so that people might be fooled into forgetting exactly what you have been accused of.