Truth and Lies

"Truth: Noun. That which most easily appeals to the fears, hopes, and prejudices of the hearer; in essence, a lie."

"Lie: Noun. That which causes its utterer to be reviled; in essence, the truth."

"Deceit: Noun. Example: A dog rolls on the carcass of a dead possum in order to deceive other animals regarding his identity as a dog (whereas) a man lolls in the scents of church in order to deceive himself regarding his identity as a thief, an adulterer, and a liar (the difference is that the dog does not first have to endure being bored by the possum)."

- Thorax, Nine Chickweed Lane

The thing about truth and deceptions is that they are always of a certain kind. If only you could recognize them before they arrive... Here are a few hints.

Tropes of Truth
First, recognize honest intent, whether expressed as the plain truth or a technical falsehood. Possibilities include:


 * Metaphoric Truth: 'I am a child at heart', 'The Earth is our mother', 'All men are brothers' -- all are known falsehoods spoken without intent to deceive. My father is not my brother, and my mother does not weigh 6.5 hexillion tons, but no one would take such statements literally -- well, almost no one.
 * Mistaken Metaphor: A metaphor, mistaken for the simple truth. Frequently done by The Ditz, the Literal Genie, and eavesdroppers, this is a standard comic device, and the spur for many a tragedy.
 * Literal Metaphor: The simple truth, mistaken for a metaphor. Often a part of the Prophecy Twist.
 * Awful Truth
 * Beware the Honest Ones
 * Blunt Yes
 * Brutal Honesty
 * Cassandra Truth
 * A Dog Ate My Homework
 * Dreaming the Truth
 * Heroic Vow
 * I Gave My Word
 * Lie Detector
 * Prophecy Twist
 * No Man of Woman Born
 * Villains Never Lie
 * New Era Speech
 * Will Not Tell a Lie

Tropes of Deception
Second, learn the myriad shades of deception, purely for self-defense, of course.
 * The Big Lie: Repeating a colossal (and frequently blatant) untruth, as loud and as often as you can, will make it easier to believe -- because no one would conceive that anyone would distort the truth so boldly and outrageously. Attributed to Lenin as "a lie repeated often enough becomes truth".
 * Cover Identity Anomaly: Missing some basic piece of information about someone you're pretending to be, often forcing you to make up something on the spot.
 * False Reassurance, a lie that is the truth in its Exact Words. A guard at a railroad track back in the 1920s was testifying that he was swinging his lamp when the automobile crashed into the train at 3 in the morning. It was determined later that while he was swinging his lamp to warn oncoming traffic, the lamp was not lit at the time.
 * Half Truth: A statement that is technically true, but extremely misleading if you don't have all the information.
 * Ignorance Is Bliss: A character or characters are told that what they are doing is something completely harmless or beneficial when it's actually dangerous or evil.
 * Mysterious Backer: The characters are only being told as much as they need to know.
 * Outright Lie: 'I am trustworthy', 'The Earth is mine to sell' -- both are falsehoods knowingly spoken with intent to deceive. This is the trademark of the Con Man and the schemer, resorted to by anyone covering up a Big Secret. However subtle they may be, Pull the Thread and they collapse (which is why the liar often takes Refuge in Audacity, to keep someone from pulling the thread).
 * Seamless Spontaneous Lie: A quick, incredibly detailed and not easily disproved lie.
 * Sarcastic Confession: A truth that will not be believed. Often used to support the Masquerade, this both deflects attention from the truth now and makes one less willing to accept the truth later.
 * Truth Twister: "Looks are only skin-deep," "The Earth is doomed," "No one who has drunk my tonic has ever died" - all carefully selected truths, intended to deceive, the hallmark of advertisers and politicians. Expect anyone unable to lie whether due to magic, Applied Phlebotinum, or just being a Manipulative Bastard type, to be good at this.
 * Unusually Uninteresting Name: This innocent sounding group are not a secret organisation of any sort, you won't even question their involvement or even notice their existence. The name is likely to be technically correct though.
 * You Didn't Ask: when a character simply doesn't tell/mention something that's particularly large, hard to avoid in conversation, or just really should have been mentioned.
 * You Said You Would Let Them Go: A villain lies to someone to get them to go along with a plan that will ultimately hurt those that they care about, or otherwise makes a promise that he has no intention of keeping. Often involves use of loopholes.

Tropes of Lies

 * Accidental Truth
 * Acting Unnatural
 * Amnesiac Liar
 * Backup Bluff
 * Bad Liar
 * Believing Their Own Lies
 * Big Secret
 * Blatant Lies
 * Its for A Book
 * Quote Mine
 * We Were Rehearsing a Play
 * Wild Card Excuse
 * Brandishment Bluff
 * Can Not Tell a Lie
 * Consummate Liar
 * Contrived Clumsiness
 * Dark Secret
 * Dug in Deeper
 * Language of Truth
 * Will Not Tell a Lie
 * Double Speak
 * Embarrassing Cover Up
 * Empty Promise
 * Engineered Heroics
 * Eyes Never Lie
 * Faking Amnesia
 * Fiction Never Lies
 * From a Certain Point of View
 * God Guise
 * God Never Said That
 * Have I Mentioned I Am Sexually Active Today
 * Hesitation Equals Dishonesty
 * I Am One of Those Too -- When you are caught in a lie by someone who just happens to have that ability / nationality for real.
 * Implausible Deniability
 * Infauxmation Desk -- Index of assorted means of deception
 * Inflationary Dialogue
 * The Inner Reveal
 * Invention Pretension
 * Keeping Secrets Sucks -- Because it involves lying a whole lot.
 * Let Them Die Happy
 * Lies Damned Lies and Statistics
 * Living Lie Detector
 * Lying Creator
 * Lying to The Perp
 * Malicious Slander
 * Memory Gambit - Making yourself believe your lies just to regain memory after everyone else starts believing them.
 * Metaphorically True
 * Mock Millionaire
 * Motivational Lie
 * The Munchausen
 * Munchausen Syndrome
 * No True Scotsman
 * The Not Secret - Something you think is a secret, but really isn't.
 * The Oldest Tricks in The Book
 * Obstructive Vigilantism - Lying to the cops for the greater good. Or not.
 * Open Secret: When everyone acts like something is supposed to be a secret, but everybody knows about it anyway.
 * Phony Veteran
 * Pinocchio Nose
 * Plagiarism in Fiction
 * The Power of Legacy
 * Recruiters Always Lie
 * Secretly Wealthy
 * Self Proclaimed Liar
 * The Shadow Knows
 * Snowball Lie
 * Invented Individual
 * Stereo Fibbing
 * Suspiciously Specific Denial
 * That Liar Lies
 * Totem Pole Trench
 * Two Faced Aside
 * Unreliable Expositor
 * Unreliable Narrator
 * Unreliable Voiceover
 * We Do Not Know Each Other
 * You Can Always Tell a Liar

Finally, remember this is just the start. Deception can be layered on deception, true lies cloaking misleading truths, until not even the trickster can tell which way up is.

See also Information Desk, about tropes whose truthiness or dishonesty is not guaranteed.