| copy_inference | merge_literals | resolve3 | |
| binary_factors | hyper_resolution | res_instance_prunes | ur_resolution | 
| binary_resolution | instantiate_clause | resolve2 | xx_resolve2 | 
void resolution_options(BOOL ordered, BOOL check_instances, BOOL initial_nuclei, int ur_nucleus_limit);
void binary_factors(Topform c, void (*proc_proc) (Topform));
void binary_resolution(Topform c, int res_type, /* POS_RES, NEG_RES, ANY_RES */ Lindex idx, void (*proc_proc) (Topform));Binary resolution.
Topform copy_inference(Topform c);This makes a "copy" inference; that is, a copy of the clause in which the justification is "copy". All attributes are copied (not just the inheritible attributes). An ID is not assigned.
void hyper_resolution(Topform c, int pos_or_neg, Lindex idx, void (*proc_proc) (Topform));Hyperresolution.
Topform instantiate_clause(Topform c, Context subst);
void merge_literals(Topform c);
int res_instance_prunes();
Topform resolve2(Topform c1, int n1, Topform c2, int n2, BOOL renumber_vars);Resolve, if possible, two clauses on the literals (specified by literals, counting from 1). Include justification, transfer inheritable attributes, but do not assign an ID. Renumbering of variables is optional.
if n2 < 0, then the literal is abs(n2), and it should be flipped.
Topform resolve3(Topform c1, Literals l1, Topform c2, Literals l2, BOOL renumber_vars);Similar to resolve2(), but literals are given instead of integers.
void ur_resolution(Topform c, int target_constraint, Lindex idx, void (*proc_proc) (Topform));Unit-resulting resolution.
Topform xx_resolve2(Topform c, int n, BOOL renumber_vars);Resolve, if possible, a clause with x=x. Renumber vars, include justification, transfer inheritable attributes, but do not assign an ID.
enum {  /* literal selection */
  LIT_SELECTION_NONE,
  LIT_SELECTION_MAXIMAL,
  LIT_SELECTION_ALL
};
enum {  /* types of resolution (binary, hyper, UR) */
  POS_RES,  /* positive */
  NEG_RES,  /* negative */
  ANY_RES   /* unrestricted by sign */
};