A Methodology of Knowledge
I can contain in my head different types of beliefs that I do not hold as "being the case". They "might" be the case. — Philosophim
So is that the difference between the beliefs in your statement about knowledge (that I quoted earlier)? So the first belief (“belief in something”) is only a belief that something might be? And the second belief (“belief that ‘the something’ is co-existent with reality”) is a belief that something actually is?
First of all I think that belief in x already indicates that you believe x is true (or 'the case' or 'co-existent with reality'), so the truthiness does not need to be further emphasised. On the other hand, if you only believe that x might be, then you should be explicit about that. So your statement should be rephrased like this:
[Knowledge] is both the belief that something might be, and a further belief that “the something” is.
But my second point is that while the statement now makes a bit more sense, I still think it’s nonsensical. I don’t think it’s possible, at the same time, to believe that x might be and that x is.
So you can believe that it might be sunny and that it might be rainy. Then when you look out the window and see that it is actually rainy, the ‘might’ vanishes, and you only believe that it is rainy. You don’t believe that it is sunny or that it might be sunny or that it might be rainy.