Tropes about something which one would expect to exist (as an inevitable part of Real Life, or a logical extrapolation from known aspects thereof) being conspicuous by its absence. In some cases these are Acceptable Breaks from Reality that facilitate Conservation of Detail, but they often inspire a degree of Fridge Logic.
High overlap with The Index of Zero, for things to do with the number zero (0).
- Bottomless Bladder
Video game characters never eat, drink, sleep, or go to the bathroom.
- Convection Schmonvection
In fiction, heat can only be transferred by direct contact. For instance, people can get within inches of magma and be perfectly fine, but if they actually touch the lava, they'll be fried instantly. (Don't try that in real life.)
- Get Back in the Closet
Homosexual relationships never go farther than suspiciously-close friendship.
- Hide Your Children
In video games where the player is able to inflict gratuitous mayhem on anyone unfortunate enough to cross their path, children are either utterly invulnerable or do not exist.
- Hide Your Lesbians
Homosexuals do not exist.
- Missed Meal Aesop
Someone never eats, and they end up learning a valuable lesson.
- Never Suicide
Characters who look like they've killed themselves never have.
- No Bikes in the Apocalypse
Once an apocalyptic event happens, characters always walk, ride animals, or look for cars; no one rides a bicycle.
- No Biochemical Barriers
Anything can copulate and produce offspring with anything else, logic and compatibility be damned.
- No Bisexuals
Everyone is either straight or gay. There is no middle ground.
- No Conservation of Energy
Energy can freely appear out of nothing and/or vanish into oblivion.
- Nobody Poops
Distasteful bodily functions are never shown onscreen.
- No Hugging, No Kissing
Romantic interactions are never shown onscreen.
- No OSHA Compliance
In fiction, facilities that are ridiculously hazardous are somehow allowed to continue existing in their present form, no matter how many people get maimed or killed in them.
- No Ontological Inertia
Got a problem? Eliminate the source of the problem and it'll be solved instantly!
- No Product Safety Standards
Nobody has any qualms against selling stuff with a knack for killing its owner.
- No Such Thing as Dehydration
In video games, nobody needs to drink to survive.
- No Such Thing as H.R.
There is no Human Resources department.
- No Periods, Period
The tendency for non-pregnant, fertile women to leak blood out of their vagina every month is completely ignored.
- No Peripheral Vision
People can't see anything that's not directly in front of them.
- No Punctuation Period
There isnt any punctuation
- Not Allowed to Grow Up
Nobody gets older.
- No Theme Tune
We don't need no stinkin' leitmotifs!
- No Transhumanism Allowed
Cyborgs and genetically-engineered people don't exist.
- No Zombie Cannibals
Undead will only consume the living — they never turn on each other.
- One Steve Limit
No two characters share the same first name.
- Perfect Health
Nobody gets sick for no reason, and nobody sneezes, coughs, etc unless they're sick.
- The Pirates Who Don't Do Anything
Someone is never seen doing their alleged job.
- School of No Studying
Nobody studies even though they're at school.
- Social Services Does Not Exist
Parents are abusive or incompetent or both, yet the kids aren't taken to social services.
- There Are No Adults
The characters are all kids and/or teens.
- There Are No Bedsheets
Video game characters sleep on top of their blankets.
- There Are No Coincidences
Someone thinks coincidences don't exist.
- There Are No Global Consequences
When aliens/monsters/etc are revealed, the general public doesn't react.
- There Are No Good Executives
All businessmen are evil.
- There Are No Police
People commit crimes, but the police never show up.
- There Are No Tents
Video game characters who are outside need to stay at hotels; they can't just camp.
- There Are No Therapists
Someone's problem could be solved if they just saw a psychologist/therapist/etc, but they don't.
- There Is No Higher Court
The people who make laws can do whatever they want.
- World of No Grandparents
Nobody's grandparents are seen.
Wait... this is an index! note