syllogism
Three-step deduction
A syllogism is a form of logical reasoning that draws a conclusion from two premises.
The classic example: All men are mortal; Socrates is a man; therefore Socrates is mortal.
More loosely, syllogism refers to any deductive reasoning or an instance of it: His syllogism was flawed—the premises didn't support the conclusion.
Foundation for logical argument
- conclusionEnd or deduction
- majorOf chief importance
- minorScale with lowered third
- middleCentral point or position
term · proposition · validity · categorical · universal · particular · affirmative · negative
Greek founder of formal logic
- OrganonSystematic method of inquiry
- AnalyticsNamed data product
- LeibnizBaroque-era polymath philosopher-mathematician
- VennLogician's diagram style
dialectic · demonstration · essence · category · species · genus · definition · predication
Reasoned case or dispute
- persuasionConvincing through reasoning
- discourseFormal communication on subjects
- debateFormal argument on issues
- disputationFormal argumentative exchange
dialectic · thesis · antithesis · synthesis · proof · refutation · rebuttal · demonstration
premise
Foundation for logical argument
- conclusionEnd or deduction
- majorOf chief importance
- minorScale with lowered third
middle · term · proposition · validity · categorical · universal · particular · affirmative · negative · quantifier
Aristotle
Greek founder of formal logic
- OrganonSystematic method of inquiry
- AnalyticsNamed data product
- LeibnizBaroque-era polymath philosopher-mathematician
Venn · dialectic · demonstration · essence · category · species · genus · definition · predication
argument
Reasoned case or dispute
- persuasionConvincing through reasoning
- discourseFormal communication on subjects
- debateFormal argument on issues
disputation · dialectic · thesis · antithesis · synthesis · proof · refutation · rebuttal · demonstration · reasoning
modus
Latin for method
undistributed
Not yet given out
- illicitProhibited by law
- equivocationAmbiguous language avoiding commitment
- affirmingDeclaring something true
denying · non-sequitur · begging · circular · fallacy · invalid · unsound · error · flaw
- puzzlespuzzles, sudoku, jigsaw puzzle, puzzle cube, crossword
- reasoningreasoning, reason, inference, deductive, analysis
- thinking skillsreasoning, reason, critical thinking, analytical thinking, analysis
- Greek scienceAristotle, Archimedes, Euclid, Ptolemy, Hippocrates
- logicpremise, premises, conclusion, conclusions, inference
- philosophyethics, metaphysics, ontology, epistemology, axiology
syllogismfallacy
Error in reasoning
logical fallacy · non sequitur · sophism · invalid argument · circular reasoning
syllogismintuition
Instinctive immediate understanding
gut feeling · hunch · heuristic · free association · stream of consciousness