AF (and other opinions): Appeal to Authority is a logical fallacy of argumentation that is often used by novice posters here (I don't know how many times PPHM posters appealed to the authority of the PPHM CEO in making their arguments for the vaidity of their drug).
There are more Ph.D's and M.D's on this board than you can shake a stick at, but few use "appeal to authority" to forward their arguments. Likewise, Roy has no official "authority" in the biotech arena (you can correct me if I'm wrong Dew, but I've read your background info and you don't list formal scientific training), but has more gravitas than most, and mostly because he has leearned what he needs to know.
AF has also learned more about biotech (and investing) than most. That's why people listen.
JM2C,
AJ