(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: The US minted 90% silver dimes, quarters, and half dollars for circulation through 1964. After that, dimes and quarters were minted for circulation in copper-nickel. From 1965 to 1969, half dollars were silver-clad and contained 40% silver.