On 12/29/2018 2:44 PM, Philip Thrift wrote:
On Saturday, December 29, 2018 at 3:39:25 PM UTC-6, Brent wrote: On 12/29/2018 12:50 PM, Philip Thrift wrote:On Saturday, December 29, 2018 at 11:02:30 AM UTC-6, Brent wrote: On 12/29/2018 1:58 AM, Bruno Marchal wrote: > I use number because people are more familiar with them. Most people > can easily conceived that “17 is odd” is true independently of them, > but would have an harder time to conceive that KKK=K independent of > them, even if this does not mean much more than the first (left) > projection of (K, K) is K. That's a good example. People would immediately recognize that KKK=K is just a convention. They are deceived that "17 is odd" is an eternal truth independent of human thought because they generalize from their experience with physically countable things. Brent I was thinking that if there is a group X of objects of the same mass, if X can be split into two groups A and B separated by a distance such that A and B pull (gravitate towards) each other equally, then X is even.Forces are equal and opposite (from conservation of momentum) no matter how the objects are grouped. Brent(or something like that) So gravity knows even and odd. :) - ptI thought /gravity could tell the difference between even and odd/, like there is no way to separate an *odd number* of pennies on a balance scale [ https://www.mathsisfun.com/definitions/balance-scales.html ] and have the scales be in balance.
OK. That's comparing the attraction to a third body (the Earth) not into two groups that gravitate toward each other.
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