Um it's kinda difficult on my end to understand what this means although i got most questions in this section right. Can anyone "translate" what they mean? Esp what does it mean by there aren't others??? Conditional logic baits Stating a necessary condition doesn't mean there aren't others. Stating a sufficient condition doesn't mean there aren't others.

then for Answer choice B, if in another world, we have gotten the relationship Ln -> disease free can we make it contraspositive: /diseasefree -> /Ln, which makes Wally the Ln?