Proof: Transitive With Four
Let's prove the following theorem:
if the following are true:
- a = b
- b = d
- a = c
then d = c
Proof:
Given
| 1 | a = b |
|---|---|
| 2 | b = d |
| 3 | a = c |
| # | Claim | Reason |
|---|---|---|
| 1 | a = d | if a = b and b = d, then a = d |
| 2 | d = c | if a = d and a = c, then d = c |
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