Proof: Write Skip Line Line 4

Let's prove the following theorem:

if the following are true:
  • the line at time 4 = 5
  • the tab at time 4 = 1
  • statement at line 5, tab 2 = self.age = age

then the line at time 5 = 6

Proof:

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

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