The name "disjunctive syllogism" derives from its being a syllogism, a three-step argument, and the use of a logical disjunction (any "or" statement.) For example, "P or Q" is a disjunction, where P and Q are called the statement's disjuncts. Equivalently, if P is true or Q is true and P is false, then Q is true. If it is known that at least one of two statements is true, and that it is not the former that is true we can infer that it has to be the latter that is true. In propositional logic, disjunctive syllogism (also known as disjunction elimination and or elimination, or abbreviated ∨E), is a valid rule of inference. The breach is a safety violation, or it is not subject to fines.In classical logic, disjunctive syllogism (historically known as modus tollendo ponens ( MTP), Latin for "mode that affirms by denying") is a valid argument form which is a syllogism having a disjunctive statement for one of its premises. Existential generalization / instantiation.Universal generalization / instantiation.Each sorrow is bagged, tagged and tranquilized, then released gently back into the subconscious. The author's mission is to capture the aches, demons, vibes, joys and urges that roam the wilderness of the psychological interior. Each original definition aims to fill a hole in the language-to give a name to emotions we all might experience but don't yet have a word for. The Dictionary of Obscure Sorrows is a compendium of invented words written by John Koenig. New episodes every Sunday, on TestTube and YouTube.
Nodus tollens latin meaning series#
That soon enough you'll flip back to this day looking for clues of what was to come, rereading all the chapters you skimmed through to get to the good parts-only to learn that all along you were supposed to choose your own adventure.įrom The Dictionary of Obscure Sorrows, a web series that defines newly invented words for strangely powerful emotions. The only thing you know is that there's more to the story. What kind of story is this? Just another coming-of-age tale, the same one your parents told, with the names switched around? Is your everyday life part of the origin story of something truly epic? Are you unwittingly getting by on other people's charity, mistaking your own luck for your own success? Are you on the cusp of some cruel twist of fate, of a golden age, of a strange new world? Are you a character in a romance, a tragedy, a travelogue, or just another cautionary tale?Īs you thumb through the years, you may never know where this all is going. It's a tangled mess of moments that don't even seem to belong in the same genre, that keeping changing depending on what you choose to highlight. Either everything seems important or nothing does. You thought you were following the arc of the story, but you keep finding yourself immersed in passages you don't understand. You know how this story is going to end, but you're still eager to skip ahead, dying to know what happens next.īut there are times when you look up and realize that the plot of your life doesn't make sense to you anymore. You trace each thread back to its origin, finding omens and ironies scattered along the way, until it all feels inevitable, and your life makes sense. So you look back and highlight certain moments as important, as turning points to the plot. The days flip past, too quickly to absorb, a mess of seemingly random events.
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