Yes, actually. it shows that under white llight it is red and under blue light it is a different color. So, the ambient light is important for color determination. This is useful information. Next, we might try to determine if there is something about the ruby that is related to color that does NOT depend on ambient light. Or, we might look for ways to predict the color based on the ambient light. In any case, it would show that 'color' is something that is not simply a property of the ruby.
So basically what you are saying is that you reject the description "grue" because it requires you to know the date to know what color something is. But you accept the description "green" which requires you to know the ambient light condition to know what color something is.
What's the difference?
You have deduced two results from a very limited formal system. But those results show nothing at all about the real world.
I completely disagree.
I would need a good definition of 'round' and 'square' first. Then I would attempt to figure out what a 'round hole that is square would look like'. I would attempt to create such and see if it was possible.
You would "attempt to figure out what a round hole that is a square would look like?" In other words, you would use rationalism to approach the problem?
If black holes existed, there would be Hawking radiation.
There is no Hawking radiation.
Therefore, black holes do not exist.
Each additional black raven that I see, without seeing a non-black raven increases my confidence that all ravens are black. When shown a white raven, that confidence goes to zero.
Really? All right. The statement "all ravens are black" is logically equivalent to the statement "Everything that is not black is not a raven." Accordingly, if seeing a black raven increases your confidence in the idea that all ravens are black then seeing a green apple should also increase your confidence that all ravens are black since the green object could have been a raven, but was not. Therefore, your theory was confirmed.
Extending this, I hypothesize that Richard Dawkins does not exist.
This is equivalent to the statement that every human being who exists is not Richard Dawkins.
Come to think of it, I passed thousands of human beings today and none of them were Richard Dawkins.
Thus, my confidence in the statement "Richard Dawkins does not exist" is quite high.
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But let's delve even more deeply. Seeing a black raven increases your confidence that all ravens are black. Why is that? It's because of your prior probabilities. But let's imagine that you meet someone who says:
All ravens are black... I'll give that a probability of 0.5
I'll see a black raven today... I'll give that a probability of 0.1
I'll see a black raven today & all ravens are black... I'll give that a probability of 0.04.
I see a black raven today. Wow! How should I update my view of the world?
New probability that all ravens are black = 0.04 / 0.1 = 40%
So this person's new belief system, after having seen a black raven, is that it is now
less likely that all ravens are black.
What made your
a priori probability numbers good and his
a priori probability numbers bad?