Proof: Do Expr At Unchanged 57

Let's prove the following theorem:

if the following are true:

expression state at time 57 = "call_build_args"
the expression at time 57 = p.age_in_months()

then the expression at time 58 = p.age_in_months()

Proof:

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Given

1	expression state at time 57 = "call_build_args"
2	the expression at time 57 = `p.age_in_months()`

Proof Table

#	Claim	Reason
1	the expression at time (57 + 1) = the expression at time 57	if expression state at time 57 = "call_build_args", then the expression at time (57 + 1) = the expression at time 57 (Call Build Args (4))
2	the expression at time (57 + 1) = `p.age_in_months()`	if the expression at time (57 + 1) = the expression at time 57 and the expression at time 57 = `p.age_in_months()`, then the expression at time (57 + 1) = `p.age_in_months()` (Transitive Property of Equality)
3	57 + 1 = 58	57 + 1 = 58 (Fixed Value Statement)
4	the expression at time (57 + 1) = the expression at time 58	if 57 + 1 = 58, then the expression at time (57 + 1) = the expression at time 58 (Substitution)
5	the expression at time 58 = `p.age_in_months()`	if the expression at time (57 + 1) = the expression at time 58 and the expression at time (57 + 1) = `p.age_in_months()`, then the expression at time 58 = `p.age_in_months()` (Transitive Property of Equality Variation 2)

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