What exactly is a 'concept' and how do we distinguish good concepts from bad ones?

Entities in the same semantic neighborhood but without a typed relation to this one — candidates for new edges or unrecognized duplicates.

• A concept is a structure invented to give a coherent account of the immediate consequences of actions in a complex system.claim0.809
  Jackson's operational definition of a software concept.
• A concept is a structure that is invented to give a coherent account of the immediate consequences of actions in a complex system.concept0.808
  Operational definition of concept.
• Concept (Formal Concept Analysis)concept0.795
• Concepts are not the same as conventional datatypesclaim0.795
  Jackson's assertion that concepts encompass state and behavior that motivates them, beyond what programmers assign to datatypes
• Concept (software design entity)concept0.791
  An increment of functionality consciously introduced by a designer to serve a purpose; the building block of a system's design.
• Concepts distinguish one system from another and also define product families.claim0.786
  Role of concepts in differentiating software.
• concept representationconcept0.785
  How a neural network encodes a semantic concept internally, argued to be better captured by manifolds than by atomic features.
• Concepts are not just subjective mental constructs, but are objective features of a system's design: increments of functionality that were consciously introduced by a designer to serve particular purposes.concept0.783
  Central definition from the abstract.