# Need help with logic homework

There are other forms of reasoning that are rational but that are generally not taken to be part of logic. These include inductive reasoning , which covers forms of inference that move from collections of particular judgements to universal judgements, and abductive reasoning , [13] which is a form of inference that goes from observation to a hypothesis that accounts for the reliable data (observation) and seeks to explain relevant evidence. The American philosopher Charles Sanders Peirce (1839–1914) first introduced the term as "guessing". [14] Peirce said that to abduce a hypothetical explanation a {\displaystyle a} from an observed surprising circumstance b {\displaystyle b} is to surmise that a {\displaystyle a} may be true because then b {\displaystyle b} would be a matter of course. [15] Thus, to abduce a {\displaystyle a} from b {\displaystyle b} involves determining that a {\displaystyle a} is sufficient (or nearly sufficient), but not necessary , for b {\displaystyle b} .