Subject S asserts a proposition P and gives a reason R or a body of evidence E that supports P.
Interlocutor I asserts that R or E is not valid because of a reason or body of evidence R2 or E2.
(and so on until…)
A. Rn or En is given and:
- I accepts P, or
- S renounces belief in P.
B. If the debate ends before A,
I remains open to P, and
S remains open to not-P
If A, then S and I accept or do not accept P as the best idea known but still remain open to P and not-P and to Rn+1 or En+1.