There will be a few -- and I do mean a very small number -- of people who have been blessed with a perfect knowledge of who the Father and the Son are and who, for reasons I cannot even begin to comprehend, deny them. These are the people known as "Sons of Perdition." They, by denying God under these conditions, are the ones the Bible says have committed blasphemy against the Holy Ghost. Their sin is the one that is referred to in the scriptures as "unforgivable." I don't believe (most Latter-day Saints would agree with me, I think) that there have been all that many people who have lived upon this earth who are in that position. Peter, James, and John, I suppose -- had they denied that Jesus Christ was the Son of God in the face of all the evidence they saw -- might have been in a position to commit the unforgivable sin. They didn't, of course. I use them only as an example of someone who could have done. Anyway, those few individuals who become "Sons of Perdition" will spend eternity in the "Hell" we Latter-day Saints more often call "Outer Darkness." It is a place where Satan and those cast out of Heaven with him will also dwell. It will truly be "Hell" but, as one LDS author one put it, (and this is his interpretation rather than an official statement of doctrine), "Such like likely be few. Hell, in the end, will be a tiny, forgotten corner of the universe. The great God will find no solace in the path these few have chosen. They were his children. Yet all has been offered: light, strength, repentance, help, knowledge, and a grace sufficient to cover all sins should each of them merely have sought forgiveness and a better way. They simply weren't interested. They simply weren't interested. None of them would be happy in heaven, anyway, and perhaps their self-selected misery is their only reward for having tried mortality."