Abduction (logic)
Etymology
From Latin "abducere" (to lead away), via "ab-" (away) and "ducere" (to lead) — the same root as the kidnapping sense. Charles Sanders Peirce repurposed the term for the move that "leads away" from a puzzling fact to a hypothesis that would explain it.
noun · /ab-DUK-shun/
Reasoning that infers the most plausible explanation for a set of observations, rather than proving a conclusion.
What it names
A handle for the everyday logic of detectives and doctors — reach for it to name inference to the best explanation, distinct from strict deduction or generalizing induction.
Example
Seeing wet grass and a dry driveway, she used abduction to conclude the sprinklers, not rain, had run overnight.
Related idea
Unlike deduction, which guarantees its conclusion, abduction only offers the best available guess — powerful for discovery but always open to revision.
noun · /ab-DUK-shun/
The criminal act of carrying a person off by force or deception; kidnapping.
What it names
The crime of seizing and taking someone away.
Example
The film centers on the abduction of a diplomat’s daughter and the race to find her.
Related idea
Unlike a lawful arrest under due-process, an abduction seizes a person entirely outside the law.
noun · /ab-DUK-shun/
In anatomy, the movement of a limb or body part away from the midline of the body.
What it names
A direction of bodily movement, paired with its opposite, adduction.
Example
Raising your arm out to the side is abduction; bringing it back down is adduction.
Related idea
Abduction and adduction are among the movements your proprioception tracks without your having to look.