Blind? Is it a sphere or cube?

Then we don't need to be told that it's unlikely to happen, either.

We had even less need for you to tell us that we didn't need to be told that it's unlikely to happen

do not do bickering, please.



how is blind person knowing what right angle looks like?

On another related note, if someone was born deaf and their hearing was restored, could they distinguish between high and low pitch?

Couldn't they do that anyway, even while deaf? You can feel sound (especially in your stomach) even if not through your ears.

Well, low pitch and high volume anyway. I'm not sure about high pitch.

Yeah true. Can't certain low pitches give you the ****s?

By your own admission, the blind person has developed the ability to see?

Then by analyzing his memories of how his hands moved over the shape, he could infer that the smooth object obviously contains no such features, and thereby choose correctly

how can he ascribe any visual information to his memories of his hand movements over the shape?

If the two test objects were defined by size instead of shape (e.g., object A is large and object B is small), memories of hand movements should provide clues for interpreting the visual information.

The key problem, as I've said before, is that interpreting a visual scene is a complex process. Sensing photons that fall on the retina is not the same as making sense of objects in the visual field. When you say that the hypothetical subject can suddenly see, the answer depends on how much of the visual processing chain has been restored. If only the retina has been repaired, the visual cortex would almost certainly be unable to make sense of the pixels, because the visual cortex has had no training. If the entire chain has been repaired, then by definition the subject can already tell the difference between sphere and cube.

You are missing the questioning
It is one thing to feel the size of an object, is another thing to see the size of an object
How does the person translate the feeling of big/small to the visual appearance of big/small

I think I didn't explain my answer clearly enough - I'll try again...

If the blind person is suddenly equipped with a fully functioning visual processing system, with all the benefits of training that a sighted person's daily experience provides, then by definition the once-blind person would have no difficulty differentiating between objects. But if the visual processing system is not fully functioning, then the answer to your question depends on which bits of it are/aren't working.

Yes. You would remember the feeling of smoothness of the sphere, and the abrupt ends on each side of the cube. By looking, you could see the object which has edges -- the cube.

Yes. If you close your eyes and feel two irregular shapes with your eyes closed then open them most people could tell you which shape was which by just looking.

And blind people can be racist.

How does person know what smooth looks like or what edges look like?

They will have a concept of when something can start and when something ends. If you use your hand to distinguish something which never ends (a ball) and something which does (the cube) you will have an inate sense of continuity? I don't know :P