public static ClBool Not(params ClObj[] args) => ClBool.Of((!ArrayHelpers.Unpack <ClBool>(args).Value));
public static ClBool IsNull(params ClObj[] args) => ClBool.Of(ArrayHelpers.Unpack <ClObj>(args) == ClCell.Nil);
public static ClBool IsTrue(params ClObj[] args) { var value = ArrayHelpers.Unpack <ClObj>(args); return(ClBool.Of(value != ClCell.Nil && value != ClBool.False)); }