Logical Extreme

Some tropes have a logical extreme that:

Fits neatly within the description of the trope
Requires no exaggeration.
And usually has at least one example of that extreme.

Bonus Points if the Logical Extreme is a trope in and of itself.

Note that sometimes a trope can have more than one Logical Extreme that fit the trope in different ways. For example, the Logical Extremes of Reclusive Artist include artists whose identities are unknown and artists whose whereabouts are unknown.

For obvious reasons, this cannot be used on YMMV items.

Compare Exaggerated Trope, which is the "Illogical Extreme".

Examples of Logical Extreme include:

Band of Relatives: Everyone in the band is related.
Broke the Rating Scale: A reviewer refuses to assign a rating at all. There are a number of examples of that on the trope page, often when the reviewer finds the work downright repulsive or otherwise not worthy of a rating.
Cast of Snowflakes: Loads and Loads of Characters given intricate and distinct tropes that separate each one of them, sometimes doubling as Doing It for the Art. Well-known examples include Touhou and Monster.
A Child Shall Lead Them:
- It would seem to be a monarch crowned at birth, which has happened (the most recent example is King Alfonso XIII of Spain). However, the Sassanid Empire set the Logical Extreme to in utero coronations; King Shapur II is the only monarch known to be crowned before he was born (the crown was placed on his mother's belly).
- In Star Wars, Naboo takes it to a different extreme by making all their rulers teenagers (they retire at twenty).
- Teenage Wasteland is where there are no adults to lead at all.
Conviction by Contradiction: Conviction by Counterfactual Clue, when the convicting "evidence" is explained away by simply checking the facts.
Face of the Band: Fans think the name of the band is that of said face—in short, the musical version of I Am Not Shazam.
I Am the Band: An artist performs under A Good Name for a Rock Band and plays all instruments and writes all songs associated with that band him—or herself. This is quite common.
Impossibly Cool Clothes: Everyone has awesome clothes, and they fit for the environment. Example: The World Ends With You.
Knight Templar: Where the Moral Guardian will do anything to protect.
Lampshade Hanging: Better Than a Bare Bulb, where Lampshade Hanging becomes a central part of the work.
- Or Lampshading a Lampshading.
Long Runner Lineup: A long-runner band that has only one lineup from start to finish. This has happened a few times.
Oven Logic: Freefall brings you cooking with explosives! Predictable results ensue.
Reclusive Artist:
- Identities Unknown:
  - Scholars are pretty sure B. Traven died in 1969 and that he was male. As for where and when he was born, what his real name was, or whether the original language of his books was German or English, on the other hand...
  - The Residents are even more unknown. Nobody has a clue who they are.
- Whereabouts unknown:
  - Richey James Edwards went missing in 1995 and was declared Legally Dead in 2008.
Revolving Door Band: A band goes through entire lineups on a regular basis. Several groups (Menudo, the Oak Ridge Boys and the Blackwood Brothers) fit this description.
Written-In Infirmity: The Character Died with Him (that is, the actor's not just sick, he or she is dead).