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I'm still unclear on why I am to negate sufficient when I come across unless, or should it just introduce the necessary condition?
"K cannot be selected for honor roll, unless H is selected to honor roll."
would I take H selected and move it to the sufficient and negate it?
/H ---->/K or contrapositive K----->H
or would it simply be
K----->H right from the start and have the "unless" introduce the necessary?
Please Help!!!
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Pick either H or K and make it the sufficient. It doesn't matter which one because which ever you pick and negate, the other will become the contrapositive.
Let's Pick H.
H is now sufficient.
Negate it (/H)
Put the other term in the necessary (/K)
/H -> /K
Now lets pick K.
K is now sufficient
Negate it (//K = K)
Put the other term in the necessary (H)
K -> H.
Hope this helps!