Logic

Anti-Einsteiniana: Natural Philosophy Alliance?
W. H. Newton-Smith, THE RATIONALITY OF SCIENCE, Routledge, London, 1981, p. 3: "For vewed sub specie eternitatis scientists (even physical scientists) are a fickle lot. The history of science is a tale of multifarious shiftings of allegiance from theory to theory. Newtonian mechanics had its hour of flourishing wit... 8 Feb 2010 08:53

Peano as the finitistic upper bound?
I was reading this: http://rationalargumentator.com/issue195/godel.html Excerpt: "... John von Neumann [...] held the view that 'Peano Arithmetic already encompasses all that can be done finitistically,'" and "According to Feferman, most mathematicians today agree with von Neumann." True? Has it be... 7 Jan 2010 13:33

A Simple but Useful System of Logic (Occam Likes)
Let A, B and C represent the following: A |- Provability “The following is provable.” B ~ Negation “The following is false.” C (aX) For All “For all values of the variables the following is true.” Then each string of ABC is a wff - and a very useful wff at that e.g.: 1. [] P 2. A |-P 3. B ~P ... 3 Jan 2010 08:20

Cardinality and Hereditary sets.
Hi all, in previous discussions about the subject of Cardinality the following question raised: is the following a theorem of ZF, For all x Exist y ( y is hereditary and y equinumerous to x ) y is hereditary is defined as y having every member of its transitive closure strictly subnumerous to y. Define... 2 Jan 2010 19:23

Cardinality once more
Hi all, In the last one month I've posted many topics on cardinality. This one is also another trial to define cardinality in ZF, i.e. without Choice. First from T. Jeck's paper, it appears that his proof can be generalized to every well orderable set x. So for every well order-able set x, there exist the s... 9 Jan 2010 09:38

Fitch's paradox and OWA
On 26 dec, 22:39, Marshall <marshall.spi...(a)gmail.com> wrote: On Dec 26, 4:36 am, Jan Hidders <hidd...(a)gmail.com> wrote: Fitch's paradox is no more. :-) From plato.stanford.edu: "As for the knowability proof itself, there continues to be no consensus on whether and where it goes wrong." ... 6 Jan 2010 09:19

~~~~~~~~~~~~~~ OBAMA SPEECHES ~~~~~~~~~~~~~~
.. ~~~***~~~ ================================================== ================================================== ENTER HERE: http://full-base.com/5/obama-speeches <<< =================================================... 26 Dec 2009 18:46

~~~~~~~~~~~~~~ ROTO ROOTER ~~~~~~~~~~~~~~
.. ~~~***~~~ ================================================== ================================================== ENTER HERE: http://full-base.com/4/roto-rooter <<< ================================================== ... 26 Dec 2009 15:28

~~~~~~~~~~~~~~ LIMITED BRANDS ~~~~~~~~~~~~~~
.. ~~~***~~~ ================================================== ================================================== ENTER HERE: http://full-base.com/4/limited-brands <<< =================================================... 26 Dec 2009 14:23

~~~~~~~~~~~~~~ MEXICAN REVOLUTION ~~~~~~~~~~~~~~
.. ~~~***~~~ ================================================== ================================================== ENTER HERE: http://full-base.com/3/mexican-revolution <<< =============================================... 26 Dec 2009 07:51