Sentence:  It follows from what has been said that a <WSD>vague</WSD> thought has more likelihood of being true than a precise one. To try and hit an object with a <WSD>vague</WSD> thought is like trying to hit the bull's eye with a lump of putty: when the putty reaches the target, it flattens out all over it, and probably covers the bull's eye along with the rest. To try and hit an object with a precise thought is like trying to hit the bull's eye with a bullet. The advantage of the precise thought is that it distinguishes between the bull's eye and the rest of the target. 
Meaning of the word marked with <WSD> tags:  Not clearly expressed; stated in indefinite terms.