Howard,
"that is how i look at it, too often we hear scientists state clearly that something is a fact until it is disproved at a later date" - that's how science works!
It's called the null hypothesis - if a scientist has an idea they postulate a hypothesis, then develop a null hypothesis to try to reject their hypothesis and until they can do this by experimental procedures (and provided the alternative hypothesis to the null hypothesis is viable) then the null hypothesis stands until it is disproven (hope that's clear

apologies for using all those words on a family forum).
The hypothesis won't be accepted by the science community unitl the experimental work has been peer reviewed (i.e. gone over with a fine tooth comb by people regarded as experts in that field) and then published in a scientific journal with sufficient information for it to be repeated by another scientist.
Even that process can have problems where the hypothesis goes against accepted scientific othodoxy (as in Peter's classic example of the earth being flat) and the people doing peer reviewing are part of that orthodoxy, which is what is happening with climate change sceptics at present - there's too much money involved worldwide to reject that it's all down to human activity.
Unfortunately once the science gets into the popular media then the facts can sometimes get in the way of a good story or the point the writers and editors are trying to make - I remember seeing a film of Richard Attenborough swimming with blue wales around Hawaii but unfortunately the very same shot had been used in a documentary on a satellite channel a few months earlier by the people actually doing the swimming who had a different view to him.
http://en.wikipedia.org/wiki/Null_hypothesis
Hate to think though how you's start to postulate a null hypothesis on the likeliehood Vic packing in?
