wollery
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- Joined
- Feb 27, 2003
- Messages
- 11,418
Perhaps you need to consult a dictionary on the meaning of the word extraordinary. Oh, and also consult someone qualified in logic, because you have the whole extraordinary evidence thing ass about face.My objection is specifically adressed to the fallacy of "Extraordinary hypotheses require extraordinary evidence.
If you had followed the logic carefully you would have noted that the first part (extraordinary hypothesis) is a fallacy because
"All hypotheses are a priori equal. (a point which you seem to actually confirm in the above)
...and second, the evidence needed to refute ANY hypothesis is the same old mundane evidence that is required in our day to day existence. Thus making the "extraordinary evidence" bit also fallacious.
It really IS as simple as that. But please, do NOT take my word for it. Consult some peer-reviewed texts, ask someone qualified in the history and philosophy of science or who has been formally trained in logic.
Let's look at the boy in the room, sweet eating Unicorn example. The boy claims that the Unicorn ate the sweets. You say that to disprove this hypothesis I just need ordinary evidence that Unicorns (which can appear out of nowhere, and change shape, and become invisible) don't exist. But that would be proving a negative, which can't be done (absence of evidence is not evidence of absence), and even if it could, how do you prove the non-existence of something that can vanish at will? ("Look, there's no Unicorn in the room." "Of course not, he vanished, silly!")
The boy has made a claim which is outside of the ordinary experience of humans, and defies the laws of the world in which we live (i.e. it is an extraordinary claim). In order to back up his claim he would need to provide evidence that Unicorns exist, otherwise his claim can be dismissed as pure fantasy. The evidence to prove that Unicorns exist would be outside of the ordinary experiences of humans, and would thus be extraordinary evidence.
The boy's hypothesis is not a priori equal, because we do not live in a world without a priori knowledge. We know, a priori, that boys eat sweets, and they also lie, and we have absolutely no evidence that Unicorns exist, all of which make the boy's story implausible at the very least.
Thus the boy's extraordinary claim requires extraordinary evidence.
