(plural paradigm shifts) 1  A radical change in thinking from an accepted point of view to a new one, necessitated when new scientific discoveries produce anomalies in the current paradigm. ( US) A radical change in thinking from an accepted point of view to a new belief.
The use of IN GOD WE TRUST has not been uninterrupted. The motto disappeared from the five-cent coin in 1883, and did not reappear until production of the Jefferson nickel began in 1938. Since 1938, all United States coins bear the inscription.
My quarter rocks. 1964 was the last year for coins minted entirely of .999 silver, however, some coins were still minted with ,90 silver up until I think 1982 or so. If you can find a 1982 dime with no mint mark it is worth about $350 in any condition. That was the year that somewhere between 30,000 and 300,000 coins were minted at the S.F. Mint but the die for the mint mark wore off. Making the coins valuable for having this flaw.