Library / Problem Structuring and Decision Support Principles Framework
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PSD.13:10 - Rationale

Recommendation composition has work left after generic evidence, comparison and choice guidance. Evidence can support a claim without determining what to advise; a comparison can leave alternatives unresolved; a choice rule belongs to the later decision. This pattern connects those qualified results to one recipient’s question and makes the supported disposition intelligible.

The six return forms avoid two extremes: treating every uncertainty as failure, and treating every engagement as a duty to name a winner. They do not replace domain decision rules. The narrowest-material-premise rule applies claim by claim so that one failed branch neither contaminates unrelated advice nor disappears inside an overall positive answer.