(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.
On 10 July 1929 the United States replaced its large size currency, like the Series 1923 Silver Certificate One Dollar bill above (click on the image for the reverse design), with small size notes, like the corresponding Series 1928 note following: