Logic Tropes

An index of tropes having to do with logic. As you can see, many of these tropes detail ways in which writers can fail at logic. For some reason, there aren't nearly as many about correct logic...

Compare Intelligence Tropes. Contrast Madness Tropes and Emotion Tropes, which frequently defy logic in various ways.


 * Logical Fallacies
 * Ad Hoc
 * Ad Hominem (Attacking the person, not the argument.)
 * Anecdotal Fallacy
 * Appeal to Authority
 * Appeal to Consequences
 * Appeal to Fear
 * Appeal to Flattery
 * Appeal to Force
 * Appeal to Ignorance
 * Appeal to Inherent Nature
 * Appeal to Nature
 * Appeal to Novelty
 * Appeal to Obscurity
 * Appeal to Pity
 * Appeal to Popularity
 * Appeal to Ridicule
 * Appeal to Tradition
 * Appeal to Wealth
 * Appeal to Worse Problems
 * Argumentum Ad Nauseam
 * Argumentum Ad Lapidem
 * Association Fallacy
 * Hitler Ate Sugar
 * Bandwagon Fallacy
 * Begging the Question
 * Cab Driver's Fallacy
 * Chewbacca Defense
 * Circular Reasoning
 * Confirmation Bias
 * Converse Error
 * Extended Analogy
 * Fallacy Fallacy
 * Fallacy of Composition
 * Fallacy of Division
 * False Cause
 * False Dichotomy
 * Four Terms Fallacy
 * Frozen Abstraction
 * Gamblers Fallacy (Probability related failure of logical.)
 * Golden Mean Fallacy
 * Historians Fallacy
 * Presentism
 * Hypostatization
 * Intentional Fallacy
 * Irrelevant Thesis
 * Kettle Logic
 * Loaded Words
 * Many Questions Fallacy
 * Mind Projection Fallacy
 * Moralistic Fallacy
 * Moving the Goalposts
 * Nirvana Fallacy:
 * Non Sequitur Fallacy
 * No True Scotsman (Defining away inconvenient items; originally "No Scotsman puts sugar in his porridge!" "Angus MacGee does." "Ah, but then he's not a True Scotsman!")
 * Perfect Solution Fallacy
 * Proof by Examples
 * Prosecutor's Fallacy
 * Retrospective Determinism
 * Reverse Slippery Slope Fallacy
 * Semantic Slippery Slope Fallacy
 * Sharpshooter Fallacy
 * Shifting the Burden of Proof
 * Slippery Slope Fallacy
 * Special Pleading
 * Spotlight Fallacy
 * Stolen Concept
 * Strawman Fallacy
 * Sunk Cost Fallacy
 * Two Negative Premises
 * Undistributed Middle
 * Bat Deduction
 * Entertainingly Wrong (When somebody is wrong, for the right reasons)
 * Fridge Logic (Logic problems that are only noticeable when you think a bit about them)
 * Headscratchers
 * Plot Hole
 * Giving Up on Logic
 * If Jesus, Then Aliens
 * Insane Troll Logic (When You Fail Logic Forever is either intentional, or crosses over into Poe's Law.)
 * Justified Trope (When use of a trope is made logical)
 * Logic Bomb
 * Moon Logic Puzzle (A puzzle whose solution relies on overly narrow or unconventional interpretations of the available evidence)
 * Occam's Razor (Explanations should avoid unnecessary complications.)
 * Puff of Logic
 * Random Passerby Advice
 * Reasoning with God
 * Right for the Wrong Reasons (When you reach the correct conclusion, but by faulty logic.)
 * Sound, Valid, True (The three are not the same.)
 * The Spock
 * Two Plus Torture Makes Five