Can you give a link to the silly blog or website that thinks it has a gotcha and who has told you to think that it is "well known"? Calvin writes:
"He does not mean simply that they were in danger of death; but he declares that it was a real and present death under which they labored. As spiritual death is nothing else than the alienation of the soul from God, we are all born as dead men, and we live as dead men, until we are made partakers of the life of Christ, agreeably to the words of our Lord,
The hour is coming, and now is, when the dead shall hear the voice of the Son of God, and they that hear shall live. (John 5:25)
The Papists, who are eager to seize every opportunity of undervaluing the grace of God, say, that while we are out of Christ, we are half dead. But we are not at liberty to set aside the declarations of our Lord and of the Apostle Paul, that, while we remain in Adam, we are entirely devoid of life; and that regeneration is a new life of the soul, by which it rises from the dead. Some kind of life, I acknowledge, does remain in us, while we are still at a distance from Christ; for unbelief does not altogether destroy the outward senses, or the will, or the other faculties of the soul. But what has this to do with the kingdom of God? What has it to do with a happy life, so long as every sentiment of the mind, and every act of the will, is death? Let this, then, be held as a fixed principle, that the union of our soul with God is the true and only life; and that out of Christ we are altogether dead, because sin, the cause of death, reigns in us."
Calvin speaks only of our senses or the remaining faculties of the soul, all that which allows us a "type of life," but which is irrelevant to the things of God. He is not claiming that we have an ability to believe in Christ because we are only "half-dead", which He expressly denies in opposition to the Catholics.