Propositional Logic

Philosophy Forums Philosophy
1

Some brain teasers from a recent class… can anyone complete these?

2

I didn’t hear a “please”…

3

My apologies sir. PLEASE. and THANK YOU.

4

Haha if you need help with your homework just ask.

5

stop throwing water balloons at the queen.

-Imp

6

Um, that argument won’t fly, If you cross or annoy the queen you are up the creek without a paddle, No one in their right mind pisses off a queen., because they like to keep their mind intact and not on the block.

You could make the queen any type of leader and the same goes. If you are in a cliche, you are not going to piss of the boss.

Now make the arguement about friends on equal levels and it makes more sense.

7

Paul Tomassi’s Logic published by Routledge.

8

can anyone help me with my hwk? lol. tried everything

9

Seems to me that queen is going to be annoyed anyway you go since it begins by stating that the queen is going to be annoyed, so it doesnt matter what you do… unless you put that period in the wrong place.

10

I’d do your homework for you, and use it as a chance to brush up on my logic, but I’m afriad I was taught different symbols by the cretens of MU.

11

Well, thinking logically, did’nt the queen going to be annoyed whatever you do?

12

it seems that you have either made a mistake re-writing the question, or the answer is in the first sentence.

13

"The Queen is going to be annoyed. If the Duchess doesn’t go to the Queen’s party, then of course she will stay home. If the Duchess does go to the Queen’s party, then the Duke wil go, too. However, if the Duke goes to the Queen’s party, the Early will stay home. If the Earl stays home, then the Countess will stay home, too. Yet, if either the Duchess stays home or the Countess stays home, the Queen is going to be annoyed.

((-p → q)&(q → r)&(r → -s)&(-s → -t)) → (-p v -t) → q

Thats a close aproximation of it, probably slightly wrong as done at 5am in 5mins with no sleep.

14

Q=Queen
D=Dutchess
U=Duke
E=Earl
C=Countess

~ = “stays home” (or in case of the queen “she’s gonna be pissed!”)

  1. ~D ↔ ~D (if she doesn’t go she will stay home)
  2. D → U (If she goes the duke will too)
  3. U → ~E (If we get the duke we loose the Earl)
  4. ~E → ~C (no earl no countess)
  5. (~D v ~C) → ~Q

let’s see what this amounts to

2+3. D → (U^~E) (meaning if the dutchess goes we’ll get the duke but no Earl)
4+5. ~E → (~C^~Q) (meaning if the earl doesn’t go we wont see the Countess and the Queen is gonna be pissed.)

so now it becomes childs play to combine it all… two things can happen.

  1. D → (U^~E^~C^~Q) (Dutchess goes and so does the Duke, but the Earl and Countess will stay home, so the queen is gonna be pissed)
    OR
  2. ~D → ~Q (Dutchess stays home, pissing the queen off right then and there)

so it becomes:

  1. (D v ~D) → ~Q (if it is true that either the dutchess goes or stays home, then it follows that the Queen is gonna be pissed)
  2. D v ~D (this is in fact the case)
  3. ~Q (so it follows that the queen is gonna be pissed.) Q.E.D.