Quote:
"50% of the walls are damp, 50% have crumbling plaster and 50% are plain
filthy."
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This one sounds stupid at first, but it's technically possible, it'd be more clear if I could draw a venn diagram, but it doesn't mention that 50% of the walls are damp, and the other 50% is

so walls could be damp, crumbling and filthy!