what is the unforgivable sin?

blasphemy of the Holy Spirit

Mat 12:31 ¶ Wherefore I say unto you, All manner of sin and blasphemy shall be forgiven unto men: but the blasphemy against the Holy Ghost shall not be forgiven unto men.

Mat 12:32 And whosoever speaketh a word against the Son of man, it shall be forgiven him: but whosoever speaketh against the Holy Ghost, it shall not be forgiven him, neither in this world, neither in the world to come.

Mat 12:33 ¶ Either make the tree good, and his fruit good; or else make the tree corrupt, and his fruit corrupt: for the tree is known by his fruit.

The unforgivable sin is to blaspheme the holy ghost.

The unforgivable sin is putting mayonnaise on a pastrami sandwich.

Taking God's Name in vain also taking the Holy Ghost in vain are Not forgivable!

To reject God and not believe, thus rejecting his gift of forgiveness and life born by the Holy Spirit.

It is when , upon hearing or reading about Jesus you didn't make the required sincere covenant with the Father that you will always obey all of Jesus' sayings . WHAT ELSE COULD IT BE ?

making the Holy Spirit out to be a liar

Wearing white after Labor Day?

Renouncing god / the holy spirit if I recall correctly.

blaspheme of the holy spirit