@nacredambition,
"What about those ridiculous questions like "If it takes four men four days to dig four holes, how many holes will two men dig in one day?"
Honestly, i cannot see the question through the Forrest of missing information!
Are the men of equal fitness? Are they all using the same tools? Is the ground harder in some places?
But most importantly - do the holes all have to be the same depth or are they just unspecified 'holes'? I could make a hole by poking a stick in the ground... that's technically a hole, and it satisfies the specificity of the question.
It relies on making assumptions that 'tend' to be true .... but is never guaranteed to be true