Thread: Things that can be proved
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  #18  
Old 02-21-2014, 02:45 PM
P.C. P.C. is offline
A Talent for Obfuscation
  
Join Date: Feb 2013
Location: In the Deep State
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Quote:
Originally Posted by MTI View Post
Can you draw a line on an inclined surface that lacks sufficient coefficient of friction to prevent retrograde movement?
One jet-propelled pencil coming up!
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