Rationale a. : An explanation or exposition of the principles of some opinion, action, hypothesis, phenomenon, or the like; also, the principles themselves.

Example:
How much of the Rationale for punishment is rightly assigned to "deterrence" arguments?

Taxonomy
Rationale, free encyclopedia, ornament, the bishops, the Bishop, Bishops, bishop of Toul, breast, precious metal, search, clothing, doing something, Polish King, Saint Jadwiga, the Roman, humeral, counterpart, pallium.

Defination from the web:
rationale is a liturgical vestment worn by clergy, in particular by Bishops, in the Roman Catholic Church which uses full vestments. ... The rationale is named after the breast ornament of a Jewish high-priest, which was a wooden brooch, overlaid with enamelled metal, fastened high ...