Lmao you can see evidence of subconsciousness on an MRI
If you are talking about a state of consciousness that allows you to do things (breathe/walk/drive/talk) without thinking about it, then yes, this state of conscousness do exist.
But if you are talking about the concept of subconscious developped by Freud and promoted by psychanalist and bad psychologist, then no, its not scientific in any way.
What nonsense is he spewing again? I haven't read a post of his in months and just assume it's virtue, martyr bullshit.