Proof: Write Skip Line State 6

Let's prove the following theorem:

if the following are true:
  • the line at time 6 = 7
  • the tab at time 6 = 1
  • statement at line 7, tab 2 = return self.age * 12

then expression state at time 7 = "not_expr"

Proof:

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Given
1 the line at time 6 = 7
2 the tab at time 6 = 1
3 statement at line 7, tab 2 = return self.age * 12
Proof Table
# Claim Reason
1 2 > 1 2 > 1
2 expression state at time (6 + 1) = "not_expr" if the line at time 6 = 7 and the tab at time 6 = 1 and statement at line 7, tab 2 = return self.age * 12 and 2 > 1, then expression state at time (6 + 1) = "not_expr"
3 6 + 1 = 7 6 + 1 = 7
4 expression state at time (6 + 1) = expression state at time 7 if 6 + 1 = 7, then expression state at time (6 + 1) = expression state at time 7
5 expression state at time 7 = "not_expr" if expression state at time (6 + 1) = expression state at time 7 and expression state at time (6 + 1) = "not_expr", then expression state at time 7 = "not_expr"

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