On Monday, February 4, 2013 12:01:38 PM UTC-5, Bruno Marchal wrote: > > > On 01 Feb 2013, at 22:09, Craig Weinberg wrote: > > I have mentioned this before, but it keeps haunting me. > > If geometry did not exist. > > Could you invent it with mathematics alone? > > And if you could do that... > > Why would you? > > For instance: A triangle can be defined mathematically in different ways, > but without the inherently geometric presentations of lines and angles, it > seems that all you could generate is a description of a set of values which > have the same relation as the values which would be present if a geometric > shape were measured or sampled from optical or tactile detections. > > That is not to say that the list of mathematical definitions which satisfy > triangularity (a^2 + b^2 = c^2 for example), even an exhaustive list, would > suggest anything like the visible presence of a shape. All of the > mathematics can be done completely in the dark, and no realism of points, > plots, displays, manifolds, topologies, etc, ever need to literally appear > to anything. > > > We don't know that. >
We don't know that we don't know that. Craig > > Bruno > > > > So why do they? > > Craig > > > > -- > You received this message because you are subscribed to the Google Groups > "Everything List" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to everything-li...@googlegroups.com <javascript:>. > To post to this group, send email to everyth...@googlegroups.com<javascript:> > . > Visit this group at http://groups.google.com/group/everything-list?hl=en. > For more options, visit https://groups.google.com/groups/opt_out. > > > > > http://iridia.ulb.ac.be/~marchal/ > > > > -- You received this message because you are subscribed to the Google Groups "Everything List" group. To unsubscribe from this group and stop receiving emails from it, send an email to everything-list+unsubscr...@googlegroups.com. To post to this group, send email to everything-list@googlegroups.com. Visit this group at http://groups.google.com/group/everything-list?hl=en. For more options, visit https://groups.google.com/groups/opt_out.
