Islam critiqued investigates Greek imagery; the disciples already know the spirit of truth?

In answer to the video "Muslims' Worst anti-Christian Polemics: Corruption of the New Testament"

So the disciples, per Jesus' words already know "the spirit of truth", because it is with and in them, during Jesus' lifetime. Jesus therefore did not need to go away as a precondition for that other paraclete to come, if "the spirit of truth" the holyspirit and the paraclete all refer to one and the same thing. Besides the fact that there was never "another" holyspirit, but there certainly was "another" paraclete.

The Greek "spirit" is pneuma and is neutral, without gender. According to 1Jn4 "the spirit of truth" is what distinguishes, among all the "spirits" those who accept Jesus as God's envoy

1Jn4"do not believe every spirit, but test the spirits to see whether they are from God..Every spirit that acknowledges that Jesus Christ has come in the flesh is from God. This is how we recognize the spirit of truth and the spirit of falsehood".

Anyone recognizing Jesus as a human being sent by God has "the spirit of truth" in him such as Muhammad, and by extension the Muslims, as opposed to the spirit of falsehood dwelling in the world that rejects Jesus as God's human envoy. This paints trinitarians as spirits of the antichrist since they do not recognize that

"Jesus Christ has come in the flesh"

but that

"God has come in the flesh".

It says that God dwells, through His spirit, in those who recognize Jesus

"This is how we know that we live in him and he in us: He has given us of his Spirit..God is love. Whoever lives in love lives in God, and God in them".

The spirit of truth is therefore coming from God and filling those who recognize Jesus' true identity. This applies to any individual, past, present and future. The disciples addressed by Jesus "know" this "other" paraclete because he is like them filled with the spirit of truth

Jn14:16-17"I will ask the Father, and he will give you another paraclete to help you and be with you forever, the Spirit of truth. The world cannot accept him, because it neither sees him nor knows him. But you know him, for he lives with you and is in you".

If by "another" paraclete Jesus meant "another" holyspirit then it would mean the disciples never knew or experienced the holyspirit. Besides the fact, again, that there never was "another" holyspirit, but there certainly was another paraclete.

The expression of being "in" eachother can easily be understood if one looks at the context of its use throughout the NT and its application for both physical and abstract subjects. Trinitarian proof texting has obscured the meaning of that expression, as it did in so many other cases. The plain meaning of Jesus, and any other entity being "in" another one simply is to share a common position, as is amply used throughout the NT.