Necessary and sufficient. With and without the Oxford comma.

Notes from my evening commute.


 We must understand that for a proposition to be true there are certain minimum requirements that must be met. These must be true in ALL Cases and we call them necessary conditions. When you are making or investigating a truth claim it may be helpful to determine what these are. If any of these fail to be true you may dismiss the claim as having false premises or conclusions (deductive).  If the necessary conditions are met, we then may ask if there are sufficient conditions. These differ in that a failure of necessary conditions negates a claim but does not support it, while sufficient conditions suggest that it may be true. To rephrase we may see that falsification may be deductive while truth is inductive at best.  Holding a position based on the necessary alone is week for positive. Claims. While meeting the minimum requirements it is not a guarantee. Sufficient reasons are selected after the necessary, we can use such tools as elegance and simplicity as well as best explanation.
To suggest a belief is rational is to say that it has covered both the necessary AND sufficient conditions of that conclusion. If sufficient conditions are not met you have at best an appeal to pragmatism or some other form of wish thinking. Agnostics can be separated into two claims; that a thing cannot be known in principle or that a thing is unknown given the current information ( but is knowable). I suppose we could be agnostic about agnosticism but that road seems short and while diverting it is beyond the scope of this essay.