Definition

1. Adjective:
   • Based on supposition rather than knowledge or proof: Relating to or involving an idea or theory that is assumed to be true without conclusive evidence.
   • Hypothetical; conjectural: Used to describe reasoning, arguments, or scenarios that are tentative and not yet confirmed by fact.

Usage

• The adjective "suppositional" is used to qualify nouns that represent ideas, reasoning, or statements. It indicates that the basis for the noun is assumption, not established fact.
• It is a formal term, often used in academic, philosophical, or legal contexts to describe provisional thinking.

Examples

• The entire plan was suppositional, built on guesses about future market trends.
• Her argument, while clever, remained entirely suppositional and lacked empirical support.
• We must move beyond suppositional scenarios and base our policy on hard data.

Advanced Usage

• In Philosophy/Logic: Used to describe a premise that is taken as true for the sake of argument, without asserting its actual truth.
  • The philosopher began with a suppositional framework to explore the ethical implications.
• In Legal Contexts: Can describe an allegation or a line of reasoning that is not yet proven.
  • The defense criticized the prosecution's case as purely suppositional.

Variants and Related Words

• Supposition (n): An idea or theory that one believes to be true without proof; an assumption.
  • His decision was based on the supposition that costs would remain stable.
• Suppositious (adj): Another formal adjective meaning hypothetical or assumed. Often interchangeable with "suppositional."
  • The document's authenticity was suppositious at best.
• Suppose (v): To assume something to be true, especially for the sake of argument or as a basis for reasoning.
  • Let us suppose for a moment that your theory is correct.

Synonyms

• Hypothetical: Based on a suggested idea or theory rather than fact.
• Conjectural: Based on incomplete information; guesswork.
• Theoretical: Concerned with the theory or hypothesis rather than practical application.
• Speculative: Based on conjecture rather than knowledge.

Antonyms

• Factual: Based on or concerned with facts.
• Certain: Known for sure; established beyond doubt.
• Empirical: Based on observation or experience rather than theory.
• Demonstrable: Clearly apparent or capable of being logically proved.

Related Phrases and Idioms

• On a suppositional basis: Acting or reasoning based on assumptions.
  • The project was approved on a suppositional basis, which later proved risky.
• Purely suppositional: Entirely based on guesswork, with no factual foundation.
  • The link between the two events is purely suppositional.

Adjective

1. based primarily on surmise rather than adequate evidence
   • theories about the extinction of dinosaurs are still highly conjectural
   • the supposed reason for his absence
   • suppositious reconstructions of dead languages
   • hypothetical situation