Skip to content
Free public beta until December 4, 2026: every course is open, no card needed. After that, the first chapter of each course stays free and full access is a one-time $39 ($19 for up to 100 founding members chosen for helpful feedback). Your progress is kept. How the beta works

joint premises

Premises that support the conclusion only when taken together.

Premises are joint (or linked) when none gives support on its own and they support the conclusion only in combination. A general rule plus a particular case is the most common pattern. In a diagram, joint premises are bracketed together and share one arrow.

Examples

  • "All residents get a parking pass. Lee is a resident. So Lee gets a parking pass." Neither premise helps alone.

See also

independent premises argument diagram
Read the full section →