Re: William T. Parry gets rid of Disjunction introduction
André G. Isaak <[email protected]>
| Newsgroups | sci.logic,comp.theory,comp.ai.philosophy,sci.math |
|---|---|
| Organization | Christians and Atheists United Against Creeping Agnosticism |
| Message-ID | <[email protected]> |
On 2026-07-06 17:40, olcott wrote: > On 7/6/2026 6:37 PM, André G. Isaak wrote: >> On 2026-07-06 16:53, olcott wrote: >>> On 7/6/2026 5:50 PM, André G. Isaak wrote: >>>> On 2026-07-06 16:36, olcott wrote: >>>>> On 7/6/2026 5:15 PM, André G. Isaak wrote: >>>>>> On 2026-07-06 15:54, olcott wrote: >>>>>>> On 7/6/2026 3:20 PM, André G. Isaak wrote: >>>>>>>> On 2026-07-06 14:04, olcott wrote: >>>>>>>> >>>>>>>>> ⊥ ⊢ ⊥ no explosion. >>>>>>>> >>>>>>>> Of course that's an explosion. It says that ⊥ demonstrates that >>>>>>>> ⊥ is true. >>>>>>>> >>>>>>> >>>>>>> That you do not know what explosion is is not my mistake. >>>>>>> I thought that one of you two guys had a PhD in math >>>>>>> is that you or Alan? >>>>>> >>>>>> I do know what explosion is in the context of logic. Apparently >>>>>> you do not. And I've never claimed to have a doctoracte in maths. >>>>>> My background is in linguistics. >>>>>> >>>>>> André >>>>>> >>>>> >>>>> You are flat our wrong about explosion. >>>> >>>> No. You claim that ⊥ ⊢ ⊥ which is to say that ⊥ can be derived from >>>> ⊥. But in a consistent logic, ⊥ shouldn't be derivable from >>>> *anything*. The >>> >>> >>> It is not explosive, full stop you are wrong. >> >> You're really not qualified to make such a claim. >> >> André >> > > Define in your own words what you think that deductive > explosion means. Odd that you should ask such a thing since you rarely if ever respond to requests for you to explain things in your own words and instead post links to wikipedia pages. deductive explosion occurs when contradictory premises are introduced into an argument therefore allowing anything, including false statements to be derived. You offered ⊥ ⊢ ⊥ ⊥ is the logical symbol representing a falsehood or contradiction. You are therefore deriving a falsehood or contradiction which shouldn't happen. The only reason you were able to do this is because your premise was ⊥. That's explosion. André -- To email remove 'invalid' & replace 'gm' with well known Google mail service.