How do we know that there are three persons in one?

Explanation:

'triad', from Latin: trinus "threefold") holds that God is one God, but three coeternal consubstantial persons or hypostases—the Father, the Son (Jesus Christ), and the Holy Spirit—as "one God in three Divine persons". The three persons are distinct, yet are one "substance, essence or nature" (homoousios).

if a bill passes in the house of representatives, it goes through a similar process in the senate. before a bill becomes law, it must be approved by both chambers of the legislature. the bill must pass with the same wording in the house of representatives and the senate before it can go to the governor for approval.

is there multiple