Question

This is a question based on first order predicate logic DSC_0030.JPG
I have done from a to d ,can someone help in verifying if these solutions are correct,if wrong please tell how to rectify it
a) if ben and david are both not deceitful then ben and albert like each other
b) claire doesn't like emily or all people except claire likes emily and david likes claire or all other people except david don't like claire
c) if claire is not deceitful then albert gifts ben and ben gifts someone
d) all people either likes somebody or doesn't like that person but not both

Answer 1

A is correct, B is correct, C is correct

Answer 2

and d?

Answer 3

I think D is too, kinda iffy. Let me reread

Answer 4

The way I was taught to read that statement is the following, maybe it might help:
For all x, there exists some Y and some z, that y and z are not the same, and all x likes SOME y and all x dont like some z.

Answer 5

So if someone likes someone, they cant like some other person, is what I got.

Answer 6

So everyone likes someone (Y), and NOT someone else (Z).

Answer 7

yes i know that but while converting to english the sentence changes many a times,so that overall meaning remains same

Answer 8

Can you explain what you mean by "the sentence changes many times"? The logic will always stay the same, so how does the sentence change many times?

Answer 9

i will message u with some concrete example then which would do,i am not saying what u said is wrong but while converting to english many a times they rephrase the sentence though

Answer 10

ty for the reply :)

Answer 11

No problemo