Paul@treetop.demon.co.uk[/email]]
An important characteristic of a scientific theory or hypotheis is
that it be "falsifiable". This means that there must be some
experiment or possible discovery that could prove the theory untrue.
For example, Einstein's theory of Relativity made predictions about
the results of experiments. These experiments could have produced
results that contradicted Einstein, so the theory was (and still is)
falsifiable.
On the other hand the theory that "there is an invisible snorg reading
this over your shoulder" is not falsifiable. There is no experiment
or possible evidence that could prove that invisible snorgs do not
exist. So the Snorg Hypothesis is not scientific. On the other hand,
the "Negative Snorg Hypothesis" (that they do not exist) is
scientific. You can disprove it by catching one.