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    ACL2-pc::drop

    (primitive) drop top-level hypotheses

    Examples:
    (drop 2 3) -- drop the second and third hypotheses
    drop       -- drop all top-level hypotheses
    
    General Forms:
    (drop n1 n2 ...) -- Drop the hypotheses with the indicated indices.
    
    drop             -- Drop all the top-level hypotheses.

    Remark: If there are no top-level hypotheses, then the instruction drop will fail. If any of the indices is out of range, i.e. is not an integer between one and the number of top-level hypotheses (inclusive), then (drop n1 n2 ...) will fail.