Wordsmith Talk |
About Us | What's New | Search | Site Map | Contact Us | |||
Register Log In Wordsmith.org Forums General Topics Words and languages in schools Logic problem
Previous Thread
Next Thread
Print Thread
OP
There's an explanation at http://pluto.fss.buffalo.edu/classes/psy/segal/416f2001/logic/98logic2.html.
Go to the bottom of the page and check out columns 1,3, and 5. In logic, that "contains" symbol (the sideways U) means "implies" or "if ... then ..."
"If P, then Q" is a proposition that has a value that depends on the values of P and Q. Extracting from that truth table:
P Q P->Q
T T T
T F F
F T T
F F T
The only time P->Q is false is when the premise (antecedent) is true and the conclusion (consequent) is false.
I was kidding a little in my response to Mav - but only a little. I'm not sure that a contradiction can be treated as a false statement. Intuitively it seems that it could, though.
k
Moderated by Jackie
Link Copied to Clipboard
Forum Statistics Forums16Topics13,913Posts229,386Members9,182 Most Online3,341
Dec 9th, 2011
Newest Members Ineffable, ddrinnan, TRIALNERRA, befuddledmind, KILL_YOUR_SUV
9,182 Registered Users
Who's Online Now 0 members (), 790 guests, and 3 robots. Key: Admin, Global Mod, Mod
Top Posters(30 Days) A C Bowden 27
Top Posters wwh 13,858Faldage 13,803Jackie 11,613wofahulicodoc 10,570tsuwm 10,542LukeJavan8 9,920Buffalo Shrdlu 7,210AnnaStrophic 6,511Wordwind 6,296of troy 5,400
Forum Rules · Mark All Read Contact Us · Forum Help · Wordsmith.org