and it's true that the necessary condition shows up but that doesn't necessarily support the conditional statement. the necessary can show up without the sufficient
life---> abundance of hydrogen and helium
abundance of hydrogen and helium
... . _Loophole_ says that the necessary condition must be the target of ... necessary as long as the sufficient is negated.
So my ... the conditional as the necessary condition when looking at an "unless ...
... of the argument. Unlike the sufficient assumption, which proves the conclusion ... indeed in USA(the necessary condition). This, of course, is under ...