//Josep, one's death extinguishes consciousness in the dead person, not in those who are alive since their brains generally are operative. But for the dead person, consciousness
is not there and there is no "now". I don't believe in a universal consciousness. It is a matter of brain waves and neurons interacting.//

That is the very thing that has to be proven not assumed. My argument is designed to prove your statement to be in logical error. My argument is constructed from the following:

i. I exist, I am conscious, I experience.
ii. I remember existing and being conscious and experiencing.
iii. If I (someday) recall an experience, then I was conscious of and during that experience. I was conscious at all the points I will (someday) ultimately remember.

There is no presupposing the conclusion that death cannot extinguish consciousness, it arises as a natural, logical fact when one takes the three statements above to their logical ends. Since they seem to be be a priori, my argument holds. It is not a matter of belief.

Permanent amnesia and death are not at all separate things if death extinguishes consciousness because to your consciousness they are indistinguishable. The dualists are right to a degree--the brain and the mind are separate.

So if you get total amnesia at some in the future, you cannot be conscious now. Why? Because consciousness skips over the events that cannot be recalled under any circumstances (i.e. permanently forgotten). The earliest recollection it can have is the instant the amnesia ends. Since this is not the case with you, then this event will never happen to you. Death would have the identical effect if it extinguished consciousness--you could not be conscious now. Since you are, death cannot extinguish consciousness. The death of the brain is not the death of consciousness. Couldn't be.

There IS a universal consciousness as Schrodinger's Cat proves but we don't need to go into that. I can prove my case without relying on it. I have already done so, in fact.