Possible Clues:

• English soldiers in the money? That's just speculation
• Something to prove what needs refining in them
• Proposition not self-evident but proved by a chain of reasoning
• Article on more complex proposition that has been proved
• Formulaic rule
• Those people must eat eggs up, it's been demonstrated
• It's more the difficult matter to be proved
• Proposition more doubtful in wake of article
• Article more unlikely, it being unproven?
• Proposition from me to her