On Thursday, October 5, 2017 at 5:55:17 PM UTC-4, qbwr...@gmail.com wrote: > On Thursday, October 5, 2017 at 1:11:12 PM UTC-7, Dan Christensen wrote: > > On Thursday, October 5, 2017 at 12:38:55 PM UTC-4, Archimedes Plutonium wrote: > > > Alright, if our knife in Conic and Cylinder... > > > > Archie, for $52.49, you can save yourself all this embarrassment. Order the "Conic Sections Model" made of transparent plastic. See for yourself -- no knives or scissors required -- that at an ellipse is indeed a conic section. > > > > http://www.eaieducation.com/Product/520610/Conic_Sections_Model.aspx > > > > If you can't afford it, maybe we can take up a collection for you. > > > > > > Dan > > I have seriously considered buying and mailing a model to Archie. > > It seems essential that the model be very precisely made. > It seems essential that the eccentricity of the model be almost 1. > It seems essential that the intersection be able to be removed, flipped > in all four possible orientations and replaced to see it is an exact fit. > > If any of those were not the case then I'm certain that Archie > would dream up some tortured convolution to claim that this doesn't > disprove his delusion and in fact it actually proves he is correct. > > It would be cute if there were two spheres of just the right size were included. > > I have not found a model online available for purchase that I thought > would be sufficiently overwhelmingly convincing. I have looked at > making such a model by hand and I don't think it would be precise enough. > > Way back soon after he started screeching his oval nonsense I told him > that he should go to a machine shop and have them produce a really > precise model out of steel that would definitely settle this question. >
Solid steel? That would be a great paperweight. Every geometry and algebra teacher would want one if it was well made. I would buy one if it was under $100. It would make a nice gift. Have it custom-engraved on the base.