Which of these is a valid conclusion?

All farmers wear straw hats.
My father wears a straw hat.
Therefore my father is a farmer.

All farmers wear straw hats.
My father does not wear a straw hat.
Therefore my father is a farmer.

All farmers wear straw hats.
My father is not a farmer.
Therefore my father wears a straw hat.

All farmers wear straw hats.
My father is a farmer.
Therefore my father wears a straw hat.

Question

Which of these is a valid conclusion?

 All farmers wear straw hats.  
My father wears a straw hat. 
Therefore my father is a farmer.

 All farmers wear straw hats. 
My father does not wear a straw hat. 
Therefore my father is a farmer.

 All farmers wear straw hats. 
My father is not a farmer. 
Therefore my father wears a straw hat.

 All farmers wear straw hats. 
My father is a farmer. 
Therefore my father wears a straw hat.

anonymous · Answer

i think its either a or d but im not sure

anonymous · Answer

The last one

anonymous · Answer

Just because you wear a straw hat, it doesn't mean you're a farmer.

anonymous · Answer

All you know is 'If farmer' -> 'then straw hat.' No other claim can be made.

anonymous · Answer

I think its D....

anonymous · Answer

otay thanks people! <3

anonymous · Answer

To put it simply. :P

And this should be in..NOT maths group.

anonymous · Answer

Logic is part of math, Sniffles.

anonymous · Answer

well its in my geo work soo...

anonymous · Answer

Now THAT would explain with I dont understand it. xD

anonymous · Answer

*why