Logiweb aspects of pbc in pyk

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The predefined "pyk" aspect

define pyk of pbc as text unicode start of text unicode small p unicode small b unicode small c unicode end of text end unicode text end text end define

The user defined "the statement aspect" aspect

define statement of pbc as pred calc infer all metavar var f end metavar indeed all metavar var g end metavar indeed lnot metavar var f end metavar infer metavar var g end metavar infer lnot metavar var f end metavar infer lnot metavar var g end metavar infer metavar var f end metavar end define

The user defined "the proof aspect" aspect

define proof of pbc as lambda var c dot lambda var x dot proof expand quote pred calc infer all metavar var f end metavar indeed all metavar var g end metavar indeed lnot metavar var f end metavar infer metavar var g end metavar infer lnot metavar var f end metavar infer lnot metavar var g end metavar infer notintro modus ponens lnot metavar var f end metavar infer metavar var g end metavar modus ponens lnot metavar var f end metavar infer lnot metavar var g end metavar conclude lnot lnot metavar var f end metavar cut notnotelim modus ponens lnot lnot metavar var f end metavar conclude metavar var f end metavar end quote state proof state cache var c end expand end define