Logiweb aspects of double negation in pyk

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The predefined "pyk" aspect

define pyk of double negation as text unicode start of text unicode small d unicode small o unicode small u unicode small b unicode small l unicode small e unicode space unicode small n unicode small e unicode small g unicode small a unicode small t unicode small i unicode small o unicode small n unicode end of text end unicode text end text end define

The predefined "tex" aspect

define tex of double negation as text unicode start of text unicode newline unicode capital n unicode small e unicode small g unicode end of text end unicode text end text end define

The user defined "the statement aspect" aspect

define statement of double negation as system s infer for all terms metavar var a end metavar indeed for all terms metavar var b end metavar indeed not metavar var b end metavar imply not metavar var a end metavar infer not metavar var b end metavar imply metavar var a end metavar infer metavar var b end metavar end define

The user defined "the proof aspect" aspect

define proof of double negation as rule tactic end define