Proof: Do Arg Stack At Unchanged 8

Let's prove the following theorem:

if the following are true:
  • expression state at time 8 = "return"
  • arguments stack at time 8 = [ [ ], [ ] ]

then arguments stack at time 9 = [ [ ], [ ] ]

Proof:

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Given
1 expression state at time 8 = "return"
2 arguments stack at time 8 = [ [ ], [ ] ]
Proof Table
# Claim Reason
1 arguments stack at time (8 + 1) = arguments stack at time 8 if expression state at time 8 = "return", then arguments stack at time (8 + 1) = arguments stack at time 8
2 arguments stack at time (8 + 1) = [ [ ], [ ] ] if arguments stack at time (8 + 1) = arguments stack at time 8 and arguments stack at time 8 = [ [ ], [ ] ], then arguments stack at time (8 + 1) = [ [ ], [ ] ]
3 8 + 1 = 9 8 + 1 = 9
4 arguments stack at time (8 + 1) = arguments stack at time 9 if 8 + 1 = 9, then arguments stack at time (8 + 1) = arguments stack at time 9
5 arguments stack at time 9 = [ [ ], [ ] ] if arguments stack at time (8 + 1) = arguments stack at time 9 and arguments stack at time (8 + 1) = [ [ ], [ ] ], then arguments stack at time 9 = [ [ ], [ ] ]

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