Free will, perfection and limits on god

Photons that produce the sensations we associate with the colour green instead produce the sensation we associate with the colour red.

Differently from us. My point is that there is no "correct" result.

I assumed not, but really there's no way to tell. And that in itself supports my point - because if it DID make a difference we should be able to tell (and in cases like colour-blindness we CAN tell that there is a difference).

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So you're saying that if somebody senses "red" from something that is actually emiting "blue," but they call it blue because that's what they've been told that it is, then it's ok?

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Isn't color-blindness an error?

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No, and no.You had it back right in Message 197.

Colour-blindness is simply being unable to distinguish between (usually) two colours. It's a disability compared to "normal" sight but it isn't "wrong" - simply a less fine ability to discriminate.

Loss of discrimination is not the same as an error. If you didn't have colour vision at all - like a dog - would your vision be wrong ? Or just restricted ?

For a comparison imagine that I have a length of wood that is exaclty 1.006 metres long. If I say that the length to the nearest metre is 1m that is not an error. If I say that the length to the nearest centimetre is 101cm then that is a finer measurement - and still not an error. If I say that the length to the nearest millimetre is 1008mm then that IS an error, despite bieng closer to the true length than either of the previos measurements.A lack of colour vision is like a less-fine measurement - like measuring to the nearest centimetre instead of the nearest millimetre. It is a loss of discrimination rather than an error.And it is false to say that errors are impossible. Optical illusions are a genuine example of an error in our sensory systems. However we can tell this because the error is not so completely systematic that it cannot be detected.

I don't think that it is worth continuing this, whenthi :

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Ok, so our interpretations can be errors

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completely misses the point.And this:

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Aren't our senses sensing what is there, and isn't the error coming from our interpretation of that sensed information from our eyes?

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looks like pointless nit-picking. Since the processing in question occurs BEFORE reaching the conscious mind it has to be considered part of the sensory system.