Theorem 2a1d

Description: Deduction introducing two antecedents. Two applications of a1d . Deduction associated with 2a1 and 2a1i . (Contributed by BJ, 10-Aug-2020)

	Ref	Expression
Hypothesis	2a1d.1	$$⊢\phi \to \psi$$
Assertion	2a1d	$$⊢\phi \to \left(\chi \to \left(\theta \to \psi \right)\right)$$

Proof

Step	Hyp	Ref	Expression
1		2a1d.1	$$⊢\phi \to \psi$$
2	1	a1d	$$⊢\phi \to \left(\theta \to \psi \right)$$
3	2	a1d	$$⊢\phi \to \left(\chi \to \left(\theta \to \psi \right)\right)$$