logic: obverse propositions

here, i shall borrow a bit of text directly from my favorite source of wikipedia. in obversion subject is the same as the original subject, but the predicate is the contradictory of the original predicate. perhaps i should go ahead and add contradictory here.


from the text we have:

some college athletes are professionals. the obverse of that would be some college athletes are not professionals. oops. i want to say non-professionals, because my modifier needs to apply directly to the predicate.

ah, the obverse also changes quality, so that would be some college athletes are not non-professionals.

wikipedia let me down there -- well, only because i didn't finish reading the entry.

so, to sum up, the quality of the original changes and the contradictory of the predicate is used.

first we will have the original, then i will type up the obverse

1. some college athletes are professionals
2. no organic compounds are metals
3. some clergy are not abstainers
4. no geniuses are conformists
5. all objects suitable for boat anchors are objects weighing at least fifteen pounds

the obverse of each of those .. need to change the quality and the contradictory of the predicate:

1. some college athletes are nonprofessionals
2. no organic compounds are nonmetals
3. some clergy are not non-abstainers
4. no geniuses are conformists
5. all objects suitable for boat anchors are nonobjects weighing at least fifteen pounds.

will check answers later