(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.
90% silver quarters, half dollars and dimes were produced until 1964. From 1965-1970 half dollars have been 40% silver while dimes/quarters contained no silver. From 1971-pres â¦ ent no silver coins have been minted for circulation. Today the US mints various collector coins in silver, but none for general circulation.