So then how would you define reprobate? The text(s) where it is used sure doesn't sound good for those who are reprobates.
In the spirit we were made perfect and sin can't stop us because faith is the issue, Jesus paid the price for our sin and made a way for us to have eternal life but IMO if you do not renew your mind then continued sin will began to effect your mind and the way i see it is you will began to become insensitive to the HOLY SPIRIT and if you continue in sin there is the potential to become reprobate and a person that is reprobate IMO is a blasphemer because they know and knows the difference between right and wrong they just don't care and don't care if it pleases GOD and they will love sin and all those that love to sin renouncing there salvation.
But i would be in total agreement with the osas doctrine if it were not for those verses in Hebrews 6.