I was going to get around to it. However, geckothegeek cites popular opinion over half a dozen times as an easy way to demonstrate the earth is round. Basically, his argument can be boiled down to, "ask <insert profession> and they will all say the world is round so it must be." It's by far his most dominant argument.
The others are rubbish too, but can we all admit that popular opinion is a poor way to decide truth before I move on?
We can agree on that, yes, and apologies for jumping the gun.
However, the citation of people working in professions which would grant them a well rounded (tee hee) knowledge of the earth, how it works, and how to navigate it could be considered professional data rather than opinion no?
I might be more inclined to take the word of a doctor on the nature of a diagnosis than that of a guy who read an article on homeopathy once while in the waiting room during an oil change.
I might be more inclined to take the word of a mechanic who says I need new brakes than my wife who tells me "I didn't hear any noise, it's fine."
-Point being that the professional input of people should carry some weight when considering matters of discussion, more so than the average shlub who happens to have an interest in the matter, and this really shouldn't be any different.
If a poster came in here and claimed he'd been a navigator on the open seas for thirty five years, and he thought the earth was flat, would you look at him with the same scrutiny as the guys cited by gecko who don't validate that particular line of thought?
Professional input needs to be weighted appropriately.