Last Updated：2025/12/31
Sentence
A
conditional
proof
corresponds
to
the
application
of
what
Douglas
Hofstadter
calls
the
"Fantasy
Rule"
in
his
masterwork
"GEB:EGB".
Surprisingly,
the
theory
of
propositional
calculus
which
he
develops
in
GEB:EGB
employs
several
inference
rules
but
no
axioms:
the
need
for
any
axioms
is
done
away
with
through
application
of
the
Fantasy
Rule.
Quizzes for review
A conditional proof corresponds to the application of what Douglas Hofstadter calls the Fantasy Rule
in his masterwork GEB:EGB
. Surprisingly, the theory of propositional calculus which he develops in GEB:EGB employs several inference rules but no axioms: the need for any axioms is done away with through application of the Fantasy Rule.
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