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Jan 7, 2016 at 15:24 comment added Jo Wehler @Chris Degnen Thanks, I have edited my answer to make clear that I mean real world objects, not ideas. Concerning ideas I agree with you: We create mathematical concepts just by thinking.
Jan 7, 2016 at 15:22 history edited Jo Wehler CC BY-SA 3.0
added "in the world"
Jan 7, 2016 at 15:17 comment added Chris Degnen Re: "We cannot create objects just by thinking about them." How about the invention of a mathematica theorem?
Jan 7, 2016 at 12:13 history edited Jo Wehler CC BY-SA 3.0
Answer expanded
Jan 7, 2016 at 9:05 history answered Jo Wehler CC BY-SA 3.0