Disjunctive syllogism is a logical reasoning method that involves two premises: one that presents a disjunction (an "or" statement) and another that negates one of the options. For example, if we have the statement "A or B" and we know that A is false, we can conclude that B must be true. This form of reasoning helps in making deductions based on available information. This logical structure is commonly used in various fields, including mathematics, philosophy, and computer science. Disjunctive syllogism is a fundamental concept in propositional logic, allowing for clear decision-making by eliminating possibilities and confirming alternatives.