Ditto on agreement about what properties (including guarantees) a system provides. To me, definitions are nonetheless useful to help summarize a set of propert

Ditto on agreement about what properties (including guarantees) a system provides. To me, definitions are nonetheless useful to help summarize a set of properties, help communication, and more. Even if people have different definitions, the definitions typically have similar themes; they're not totally arbitrary. For example, with "decentralization" you'd find a lot of people agreeing that "no single entity owns or controls" within the same theme as other definitions.