“Never bet on a possibility against a certainty”

“Never bet against a certainty” or “never bet against a sure thing” has long been common wisdom. But what about having good odds on a possibility?
 
“Never bet on a possibility against a certainty” was said in a 1962 issue of U.S. News & World Report to be “an old financial adage.” A 1962 issue of the Atlanta Economic Review also describes “Never bet on a possibility against a certainty” as “an old financial adage.” Other citations of the adage are lacking, but the logic of the adage is commonly known.
 
   
Google Books
U.S. News & World Report
Volume 52, Issues 10-18
1962
Pg. 69:
“There’s an old financial adage, ‘Never bet on a possibility against a certainty.’”
     
Google Books
Atlanta Economic Review
Volumes 12-13
1962
Pg. 7:
“Never bet on a possibility against a certainty” is an old financial adage!
 
Prop Secrets
Thursday, September 30, 2010
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LESSON LEARNED: Never bail on a sure thing. Never bet on a possibility.