Irad Kimhi's book is in my view one of the most important books in philosophy to have appeared of late. To set it in its proper context, it may help to begin with the following excerpt from a course by Wittgenstein:
Thinking, wishing, hoping, believing, and negation all have something in common. The same sort of puzzling questions can be asked about each. How can one wish for a thing that does not happen or hope that something will happen that does not? How can not-p negate p, when p may not be the case, i.e. when nothing corresponds to p?
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