Life on the Edge
Let's say you get hit by a bus and you didn't even see it coming. One second you're thinking about school or work, the next you're not thinking at all. In the last instant before you die, you are totally unaware that your current thought is your last. You are about to cease to exist, and you have no idea. What's worse, once you're dead, there's no opportunity to realize what happened.
Now let's step back a little. Your brain consists of a mass of neurons all firing and sending signals along. Your consciousness, your current thought, can be entirely captured by taking a snapshot of the neural state and connection pattern of all your neurons at any given time. Each thought you have is succeeded by another and another in a stream of consciousness. Each new thought you have is the result of your current neural state, your current brain chemical state, sensory input you receive from the outside world, and internal stimulus such as hunger and other drives. Each new thought bleeds into the next creating the feeling of continuity of being.
I am going to make the claim that continuity of thought does not necessarily mean you are the same person day to day. In fact, a person's existence could be as fleeting as the duration of one's current neural state. In this case, continuity would be an illusion erected by the echoes of memory.
In other words, your current thought might be your last. You may be facing utter oblivion in the next nanosecond. And just like the bus victim, you wouldn't know it's coming. Under this scheme you are your current thought. You were born just a nanosecond ago, and you will die when you are overtaken by your brain's next thought. And with this new thought will be born a new consciousness to replace you.
Fortunately you can't fathom this, and you have all kinds of evidence to show that your consciousness does have permanence. All this memory floating around proves you've been around since you were born. Right? Unfortunately, the reason you know about your past thoughts is the same reason the bus driver knows that he hit someone. Unfortunately, you won't know you were hit. So enjoy your next nanosecond.
Now let's step back a little. Your brain consists of a mass of neurons all firing and sending signals along. Your consciousness, your current thought, can be entirely captured by taking a snapshot of the neural state and connection pattern of all your neurons at any given time. Each thought you have is succeeded by another and another in a stream of consciousness. Each new thought you have is the result of your current neural state, your current brain chemical state, sensory input you receive from the outside world, and internal stimulus such as hunger and other drives. Each new thought bleeds into the next creating the feeling of continuity of being.
I am going to make the claim that continuity of thought does not necessarily mean you are the same person day to day. In fact, a person's existence could be as fleeting as the duration of one's current neural state. In this case, continuity would be an illusion erected by the echoes of memory.
In other words, your current thought might be your last. You may be facing utter oblivion in the next nanosecond. And just like the bus victim, you wouldn't know it's coming. Under this scheme you are your current thought. You were born just a nanosecond ago, and you will die when you are overtaken by your brain's next thought. And with this new thought will be born a new consciousness to replace you.
Fortunately you can't fathom this, and you have all kinds of evidence to show that your consciousness does have permanence. All this memory floating around proves you've been around since you were born. Right? Unfortunately, the reason you know about your past thoughts is the same reason the bus driver knows that he hit someone. Unfortunately, you won't know you were hit. So enjoy your next nanosecond.