Proof: Write Skip Line Line 23

Let's prove the following theorem:

if the following are true:
  • the line at time 23 = 4
  • the tab at time 23 = 0
  • statement at line 4, tab 1 = a = 8

then the line at time 24 = 5

Proof:

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Given
1 the line at time 23 = 4
2 the tab at time 23 = 0
3 statement at line 4, tab 1 = a = 8
Proof Table
# Claim Reason
1 1 > 0 1 > 0
2 the line at time (23 + 1) = 4 + 1 if the line at time 23 = 4 and the tab at time 23 = 0 and statement at line 4, tab 1 = a = 8 and 1 > 0, then the line at time (23 + 1) = 4 + 1
3 4 + 1 = 5 4 + 1 = 5
4 the line at time (23 + 1) = 5 if the line at time (23 + 1) = 4 + 1 and 4 + 1 = 5, then the line at time (23 + 1) = 5
5 23 + 1 = 24 23 + 1 = 24
6 the line at time (23 + 1) = the line at time 24 if 23 + 1 = 24, then the line at time (23 + 1) = the line at time 24
7 the line at time 24 = 5 if the line at time (23 + 1) = the line at time 24 and the line at time (23 + 1) = 5, then the line at time 24 = 5

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