David Hume (1711-1776) took Gottfried Leibbniz's fork and added a prong.
Every Statement Can Be Put Into One Of Three Categories
1. True or False by definition.
2. Dependant on experience.
3. Nonsense
(1) The statement "1+1=2" is true by definition. The number '2' is just another way to express the statement '1 and another 1'; it doesn't add anything to the idea of '1 +1'.
(2) The statement "Bill Gates is rich" is based on experience, not logic. Bill Gates could be poor and still be Bill Gates. (While '1+1' could not equal '4' and still be '1+1')
(3) There are some things that don't fit into these two categories. These, according to Hume are stuff and nonsense. "Dragons fly" is not factual, and therefor a bad thing*.
Only the second category was worth looking at, as it is the only set of new, useful information. He called a piece of 'real knowledge' a synthetic statement.
This bit of nonsense started empiricism, notable for pointing out that the statement 'God exists' fell into the nonsense category.
Take a gander at Hume's Maxim.
*A quote from Hume on the subject nonsense and books containing such: "Commit it all then to flames, for it can contain nothing but sophistry and illusion".
And a P.S. to DrRetard; I think this would likely be considered nonsense because it is not saying that dragons could fly, it is saying that dragons do fly; the former is arrived at by the method you describe, while the later cannot be, nor can it be reached by any other deductive or observational achievement (as far as I know). |