Logic puzzle might be present in lieu of a grid in a puzzle about the location of different shops. Logic puzzle A logic puzzle is a puzzle deriving from the mathematics field of deduction. The logic puzzle was first produced by Charles Lutwidge Dodgson, who is better known under his pen name Lewis Carroll, the author of "Alice's Adventures in Wonderland". In his book "The Game of Logic" he introduced a game to solve problems such as confirming the conclusion "Some greyhounds are not fat" from the statements "No fat creatures run well" and "Some greyhounds run well". Puzzles like this, where
Resolution (logic) premises hold, then the conclusion formula_19 is true. Resolution rule can be generalized to first-order logic to: where formula_21 is a most general unifier of formula_22 and formula_23 and formula_24 and formula_25 have no common variables. The clauses formula_26 and formula_27 can apply this rule with formula_28 as unifier. Here x is a variable and b is a constant. Here we see that In first order logic, resolution condenses the traditional syllogisms of logical inference down to a single rule. To understand how resolution works, consider the following example syllogism of term logic: Or, more generally: To recast the reasoning