diff --git a/packages/logic-solver/logic.js b/packages/logic-solver/logic.js
index 5b26963121..d40f5c25b4 100644
--- a/packages/logic-solver/logic.js
+++ b/packages/logic-solver/logic.js
@@ -250,8 +250,8 @@ Logic.Solver = function () {
   self._name2num = {}; // (' '+vname) -> vnum
 
   // true and false
-  var F = self.getVarNum(Logic.NAME_FALSE, true); // 1
-  var T = self.getVarNum(Logic.NAME_TRUE, true); // 2
+  var F = self.getVarNum(Logic.NAME_FALSE, false, true); // 1
+  var T = self.getVarNum(Logic.NAME_TRUE, false, true); // 2
   if (F !== Logic.NUM_FALSE || T !== Logic.NUM_TRUE) {
     throw new Error("Assertion failure: $T and $F have wrong numeric value");
   }
@@ -278,14 +278,14 @@ Logic.Solver = function () {
 };
 
 // Get a var number for vname, assigning it a number if it is new.
-// Setting "_createInternals" to true grants the ability to create $ variables.
-// Setting "_noCreate" to true causes the function to return 0 instead of
+// Setting "noCreate" to true causes the function to return 0 instead of
 // creating a new variable.
-Logic.Solver.prototype.getVarNum = function (vname, _createInternals, _noCreate) {
+// Setting "_createInternals" to true grants the ability to create $ variables.
+Logic.Solver.prototype.getVarNum = function (vname, noCreate, _createInternals) {
   var key = ' '+vname;
   if (_.has(this._name2num, key)) {
     return this._name2num[key];
-  } else if (_noCreate) {
+  } else if (noCreate) {
     return 0;
   } else {
     if (vname.charAt(0) === "$" && ! _createInternals) {
@@ -328,7 +328,7 @@ Logic.Solver.prototype.toNumTerm = function (t, noCreate) {
       t = t.slice(1);
       not = ! not;
     }
-    var n = self.getVarNum(t, false, noCreate);
+    var n = self.getVarNum(t, noCreate);
     if (! n) {
       return 0; // must be the noCreate case
     } else {
@@ -653,7 +653,7 @@ Logic.Solver.prototype._formulaToTerm = function (formula) {
       }
       var numForVarName = this._nextFormulaNumByType[type]++;
       info.varName = "$" + formula.type + numForVarName;
-      info.varNum = this.getVarNum(info.varName, true);
+      info.varNum = this.getVarNum(info.varName, false, true);
       this._ungeneratedFormulas[info.varNum] = formula;
     }
     return info.varNum;
diff --git a/packages/logic-solver/logic_tests.js b/packages/logic-solver/logic_tests.js
index a62615c3ee..615374d755 100644
--- a/packages/logic-solver/logic_tests.js
+++ b/packages/logic-solver/logic_tests.js
@@ -1184,6 +1184,21 @@ Tinytest.add("logic-solver - simple solve", function (test) {
   test.equal(s._minisat._clauses.length, 9);
 });
 
+Tinytest.add("logic-solver - getVarNum", function (test) {
+  var s = new Logic.Solver();
+  s.require("A");
+  var a = s.getVarNum("A");
+  test.isTrue(a > 0); // this also confirms it's a number
+  test.equal(s.getVarNum("B", true), 0); // noCreate = true
+  var b = s.getVarNum("B");
+  test.notEqual(a, b);
+  var a2 = s.getVarNum("A");
+  var b2 = s.getVarNum("B");
+  test.equal(a, a2);
+  test.equal(b, b2);
+});
+
+
 Tinytest.add("logic-solver - assumptions", function (test) {
   var s = new Logic.Solver;
   s.getVarNum("A");