> patronizingly calling them 19th century > techniques. I imagine in another few hundred > years the specialists of the time will call > today's techniques d

> patronizingly calling them 19th century > techniques. I imagine in another few hundred > years the specialists of the time will call > today's techniques damaging. How is it patronizing to mention that techniques from more than a 100 years ago are less effective than what we could do with today's knowledge/techniques? I would hope that specialists in a few hundred years time would be able to spot certain damaging practices that we're not aware of today. Was there some derogatory comment that I missed about how amateurish experts of the past were?