(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.
Best Answer: 1964 was the last year that dimes, quarters and half dollars were minted in solid silver. The half dollar continued to be silver clad through 1967. The nickel was never minted in silver. I don't think we ever did mint all coins in silver. Only dollars, half dollars, quarters an dimes.