1. The second, more natural reading is the bound variable reading. 2. Linguists like bound variables , a term borrowed from logic. 3. Sch�nfinkel developed a formal system that avoided the use of bound variables . 4. Closures are functions evaluated in an environment containing bound variables . 5. The existence of bound variables is perhaps more apparent with the following example: 6. Note that many of these are operators which act on functions of the bound variable . 7. The concepts of free and bound variables apply in the same manner to infinite formulae. 8. In many cases, this definition makes correct predictions about the availability of bound variable interpretations. 9. This leads to an ambiguity, in which the second interpretation is the bound variable interpretation. 10. Bound variables are variable names that are already attached to formal parameter variables in the expression.