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More ways to get Braingle...

Hey No Smoking

Science brain teasers require understanding of the physical or biological world and the laws that govern it.

 

Puzzle ID:#14953
Fun:*** (2.85)
Difficulty:** (1.62)
Category:Science
Submitted By:od-1Aca****
Corrected By:tangled_brain

 

 

 



Duffus walked through the back door of a toy factory where the paint thinners were stored. He noticed two men working on an aluminium racking system. One man pulled out a cigarette and was about to light it when Duffus pointed at the large "No smoking" signs near the paint thinners. The man scowled and put the cigarette away as Duffus walked off into the plant. Moments later the fire alarm rang as the paint thinners went up in flames. The fire inspector questioned the two workmen who were by the thinners and was about to release them when Duffus interrupted, "You're not letting them go, are you?"
"Yes. There are no eyewitnesses and no evidence they were smoking as the whole area was burnt to a crisp. Besides, they claim that while grinding the edges off the racking a spark set off the blaze," replied the inspector.
"I can't prove they were smoking but I can prove they are lying," exclaimed Duffus.
How did Duffus know they were lying?





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