Related Clues:

• Euclidean proposal
• Something to prove what needs refining in them
• Proposition not self-evident but proved by a chain of reasoning
• See 18
• The more obscure proposition
• The more unusual form of demonstrable principle
• Proposition third parties receiving aggregate
• Proposition others about mineral source
• Moon module master's theme
• Truth found by a 27 team, deserving fellows
• The more curious formula
• Man will pursue a treasure-promising sign - that's taken for granted
• It may be proved by meteor fragments containing hydrogen
• Those people comprehend nothing about the proposition
• Article with more unusual proposition