MENTAL MODEL · M3255

Ring Species

Learn & MetacognitionHigh supportCognitive Science

Included

Version 1.0.0 · Updated 2026-07-31

CORE DEFINITION

A species distributed around a geographic barrier (such as a mountain range), where adjacent populations can interbreed (A can produce B, B can produce C), but the two ends that meet after going around the circle (A and Z) are reproductively isolated and cannot interbreed.

SCAFFOLDING EFFECT

psychology

Reduce cognitive load

Non-transitive cognition. It breaks the linear logic of "A=B, B=C, therefore A=C". It illustrates that accumulation of quantitative changes can lead to qualitative changes, and that the concept of "species" itself is vague and continuous. In taxonomy and logical deduction, be wary of the definitional paradox brought about by such ring-like gradual changes.

anchor

Anchor fast decisions

In a ring of adjacent populations that can interbreed, the populations at the two ends have already become reproductively isolated, indicating that the boundary of a "species" can be continuous. The mechanism is gradual change plus a ring-shaped geographic distribution.

MINIMUM ACTION

In progress 0/3

Practice this model in one real situation:

Examine the interbreeding ability of adjacent populations along the ring
test whether the two ends can interbreed
use this to argue about species boundaries.

Check to track your progress (stored locally)

Learning progress0%

account_treeGenealogyexpand_more

menu_bookReferencesexpand_more

Source support: Explicit

link
zh.wikipedia.orghttps://zh.wikipedia.org/wiki/%E7%92%B0%E7%89%A9%E7%A8%AEZH · Explicit
verified

RELATED MODELS