Dude.. I am not math major in any way.. but I was interested so I tried after going through some site  (wiki and others) I found [ //regentsprep.org/Regents/Math/tables/ifthen.htm ] Enrichment only: (not tested on Math A or Math B) Mathematicians often use symbols and tables to represent concepts in logic.  The use of these variables, symbols and tables creates a shorthand method for discussing logical sentences. Truth table for conditional (if...then): (notice the symbol used for "if...then" in the table below)            T    T    T T    F    F F    T    T F    F    T     A truth table is a pictorial representation of all of the possible outcomes of the truth value of a compound sentence.  Letters such as  and  are used to represent the facts (or sentences) within the compound sentence.   ((P→Q)→R)→S) So According to it P    Q    P->Q T    T    T T    F    F F    T    T F    F    T   Now trying each (P->Q) for different R P->Q    R    ((P-Q)->R) T    T    T F    T    T T    T    T T    T    T T    F    F F    F    T T    F    F T    F    F   ((P-Q)->R)    S    (((P-Q)->R)->S) T    T    T T    T    T T    T    T T    T    T F    T    T T    T    T F    T    T F    T    T T    F    F T    F    F T    F    F T    F    F F    F    T T    F    F F    F    T F    F    T I also think that it is correct. As 4 variables can have 2^4=16 states, the final table have same number

kya_naam_disturb · Feb 8, 2009 7:19 AM

anyway.........thankx dude.....

score · Feb 8, 2009 7:29 AM