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Physics, Astronomy & Cosmology / Re: How significant is this?
« on: 08/08/2014 13:48:01 »But if you have two pin holes you can't tell which one it went through and when it went through either of them. If you can't tell when something was at a place then you can't really have said to have measured its position.
Sure you can, but you haven't localized it with the same precision as if you used a single pinhole. Even if you don't like calling that a measurement, and I can understand why it might not be the best term for it, it's the standard terminology in the field.