XVII Recapitulation of the genealogy of Reason--It
is the art of conceiving the Future and Unknown--Dialectic
the science of Reason--Division of theorems into
Arguments and Fallacies--Method of Dialectic 68
XVIII The RATIONAL PARALLEL--Rational
Conclusions are never certain--Essential parts of an
Argument--Rules of Parallel--False conclusions cannot
be destroyed but may be stigmatised--In what
circumstances we may reason concerning a known fact 74
XIX Hypothetical Arguments--Current errors
with respect to these--Dilemma 80
XX DEBATE is extra-dialectic--How a
valid argument may be criticised 87