[dangus]

The point is that once Matthias is an apostle, he is fully an apostle. So, we know that the apostles can appoint replacement apostles. And since a replacement apostle is fully apostles, he could then do anything an original apostle could do... including taking part in appointing a replacement apostle.

[ravenwolf]

The point is that once Matthias is an apostle, he is fully an apostle.

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Yes, but Matthias wittnesed the resurection, the appostles
had to choose some one who had wittnesed the resurection.

act 1:22 Beginning from the baptism of John, unto that same day that he was taken up from us, must one be ordained to be a witness with us of his resurrection.