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    • Proof-tree

    Proof-treep

    Recognizer for proof-tree structures.

    Signature
    (proof-treep x) → *

    Definitions and Theorems

    Theorem: consp-when-proof-treep

    (defthm consp-when-proof-treep
  (implies (proof-treep x) (consp x))
  :rule-classes :compound-recognizer)