Judas was always gone.
John 17:11-13
11 Now I am no longer in the world, but these are in the world, and I come to You. Holy Father, keep through Your name those whom You have given Me,[a] that they may be one as We are. 12 While I was with them in the world,[b] I kept them in Your name. Those whom You gave Me I have kept;[c] and none of them is lost except the son of perdition, that the Scripture might be fulfilled. 13 But now I come to You, and these things I speak in the world, that they may have My joy fulfilled in themselves.
John 17:11-13
11 Now I am no longer in the world, but these are in the world, and I come to You. Holy Father, keep through Your name those whom You have given Me,[a] that they may be one as We are. 12 While I was with them in the world,[b] I kept them in Your name. Those whom You gave Me I have kept;[c] and none of them is lost except the son of perdition, that the Scripture might be fulfilled. 13 But now I come to You, and these things I speak in the world, that they may have My joy fulfilled in themselves."
Excellent exegesis. This is how the Scriptures need to be used. Full picture, complete unfolding, reading the whole story. Thank you for this.