Metamath Proof Explorer
Description: Shortens orfa2 (58>53), pm1.2 (20>18), pm1.2 (20>18), pm2.4 (31>25), pm2.41 (31>25), pm2.42 (38>32), pm3.2ni (43>39), pm4.44 (55>51). (Contributed by BJ, 30-Sep-2019)
|
|
Ref |
Expression |
|
Hypothesis |
bj-jaoi1.1 |
⊢ ( 𝜑 → 𝜓 ) |
|
Assertion |
bj-jaoi1 |
⊢ ( ( 𝜑 ∨ 𝜓 ) → 𝜓 ) |
Proof
Step |
Hyp |
Ref |
Expression |
1 |
|
bj-jaoi1.1 |
⊢ ( 𝜑 → 𝜓 ) |
2 |
|
id |
⊢ ( 𝜓 → 𝜓 ) |
3 |
1 2
|
jaoi |
⊢ ( ( 𝜑 ∨ 𝜓 ) → 𝜓 ) |