Another indicator of the presence of medical waste, which may be used instead of or in addition to the red or orange color code, is the BIOHAZARD symbol. Medical waste from health care facilities must be treated in a way that destroys its potential for causing disease, prior to disposing it in a landfill.
In classical logic disjunctive syllogism (historically known as modus tollendo ponens) is a valid argument form which is a syllogism having a disjunctive statement for one of its premises.
Noun[edit] disjunction â(plural disjunctions) 1  act of disjoining; disunion, separation. 2  state of being disjoined. ( 3 logic) The proposition resulting from the combination of two or more propositions using the or operator. ( mathematics) a logical operator that results in true when some of its operands are true.