Intelligence

Summary
Intelligence is a word that is incredibly difficult to define, as it has been used to refer to many things, such as one's ability to process information, or their capacity for logic, self-awareness, creativity, reasoning, and/or problem solving, or their knowledge and memory. In its fullest definition, intelligence can be said to encompass all these things, which makes it incredibly difficult to quantify in versus debating terms, as many individuals may have plentiful ability in one area, such as knowledge, and also be lacking entirely in another, such as planning, emotional intelligence, or creativity.

Suggested Rankings
There is no way to reliably quantify intelligence, and even these rankings are just suggestions and guidelines for pages. It is more important that a page discusses a character's intelligence and gives feats for their varying skills than have a solid ranking, though it may help with quickly summarizing their overall intellects and how they measure up to others.

Mindless: Those few beings that are literally mindless and have no capacity for intelligence at all.

Animalistic: Beings, such as animals, that only possess basic reasoning, awareness, and problem-solving skills. While various animals, such as chimpanzees, may possess higher capacities for such things, their intelligence would still remain animalistic.

Below Average: Characters of below average intellects and unremarkable skills.

Average: Characters of average intelligence. While they have more developed intelligence in certain subjects, in many cases, their overall intelligence remains average.

Above Average: Characters that show greater cognitive ability than the norm, but do not particularly stand out in any intellectual or academic fields.

Gifted: Character that demonstrate high reasoning ability, can master concepts with few repetitions, and display high performance capability in intellectual, creative, or specific academic fields.

Genius: Individuals with an exceptional capacity for knowledge and intelligence, generally in one area of varying depth, often possessed by fictional scientists and strategists. This level of intelligence is the level of actual geniuses and famous intellectuals in the real world and, in lieu of better feats, should be the default intelligence category for fictional characters treated as if they have exceptional or superhuman intelligence.

Extraordinary Genius: Individuals whose knowledge spreads over many fields of science and who vastly surpass the intellects of the smartest humans on Earth. At this level, many are capable of creating futuristic technology, executing complex strategies even under high pressure, and potentially even accurately predicting the future through sheer mental calculations, or outperforming supercomputers. This is where super scientists of exceptional scientific knowledge begin to appear.

Supergenius: The highest level of non-omniscient intellect, possessed by those individuals with unfathomably superhuman intelligence and extensive mastery of most, or all, branches of science. Characters of such a scale tend to be super scientists capable of creating impossibly advanced physics-defying fantasy technology even with just household items, and outsmarting even other extremely intelligent individuals. Supergeniuses can often easily process calculations beyond modern humanity's combined capabilities on their own, and quickly come up with extremely complex plans.

Nigh-Omniscient: Characters who have knowledge of nearly everything, with only minuscule gaps existing in their knowledge.

Omniscient: Characters who know literally everything. Be aware that even if they may know everything in their own setting that this does not grant them knowledge of beings from outside of it.