A lost person does not have to blaspheme the Holy Ghost to be lost for he is condemned already.
I agree with this statement, everyone who dies in his sins in this age of grace, will untimately perish, because of the sin of blashpeme.
And I am sure it is also, the same sin for those of other dispensational periods.
Sin it is clear to me, the Spirit of God has from the begining testifying concerning Jesus.
I base this thought on what the scriptures tell us, concerning Moses at Heb 11:26.
Blessings,
Petro