Promises fall into three kinds with different legal enforceability

Evidence

Legal rules defining the ways in which valid contracts or wills or marriages are made do not require persons to act in certain ways whether they wish to or not. Such laws do not impose duties or obligations. Instead, they provide individuals with facilities for realizing their wishes, by conferring legal powers upon them to create, by certain specified procedures and subject to certain conditions, structures of rights and duties within the coercive framework of the law. — HLA Hart, The Concept of Law (Clarendon Law…, 175 (#qualifies, via linked claim)

Categorization

• XREF: connects to: The right to be sued gives one power to make credible promises — Thomas C. Schelling, The Strategy of Conflict, 113; Contract law enforces promises only when stakes are high and reliance is costly; Certain laws provide facilities for realizing wishes instead of imposing duties. — HLA Hart, The Concept of Law (Clarendon Law…, 175 (+1 more)

Related

• The right to be sued gives one power to make credible promises (similarity 0.79)

Broader Connections

• Certain laws provide facilities for realizing wishes instead of imposing duties. #qualifies (0.75) — HLA Hart, The Concept of Law (Clarendon Law…, 175