Logical System stegeman 6/25/26 Try some simple proofs for yourself using this If you can see this, your browser does not understand IFRAME. Video on using the Edit Menu Your browser does not support the video tag. Book traversal links for Steven A. Stegeman, The Return of Rationality: Under Construction 2 ‹ Steven A. Stegeman, The Return of Rationality: Under Construction 1 Up Appendix: Testing ›