Part I Proof fields and certificates
On this page · Permalink · Source line 227
A completed proof occupies only part of its surrounding field. Keep the successful deduction, but do not confuse its unused alternatives with either errors in that deduction or proofs of impossibility.

The governing distinction
On this page · Permalink · Source line 227
A proof field preserves more than a proof needs. Its failed and unresolved records remain available to inquiry without acquiring the force of certified deductions.