Our atoms and energy continue on after we die, becoming a part of many other living things. That is our continued existence. I don't see how the energy that came together to form the individual that I am could ever come together again in the exact same way to form another me. It would not only have to happen for me, but for all of my ancestors.

I’m very sorry for your loss. I lost my dog Matilda on the 14th, so I feel you.

We don't know for sure about either of these but I tend to believe in both infinite time and infinite space. I also accept as a likely truth that anything that can happen given enough time, will happen. This then implies that you have, and will in the future, and are somewhere else right now, existed, will exist, are existing in infinite variety and infinite sameness.

Another way to think about it.
It is possible, that the flow of time is an illusion, what existed still exists and what will exist already exists.

Your dog is still there somewhere, just not here with you now.. I am sorry you lost a friend. I lost my bat-shit crazy little dog more than twenty five years ago and I still miss him. I still see him in my mind's eye running around the house jumping on the furniture and crashing into walls where the floor is slippery. Running just for the joy of running.

Who we are is determined by genetics and experiences. We are formed from atoms and to atoms we will return. If those atoms are reused to create another human, that won't be a duplicate of me because there is no way to recreate everything that has happened to become me. Yeah, it means you don't get your dog back, I'm sorry.

I understand what you're saying.
I miss my dog, too.
It still breaks my heart that she's gone.

Neither of them are ever coming back.
When we're dead, we're dead.

Think "Pet Semetary".
If anything were to "come back", it wouldn't be the same as
it was before.

Reincarnation just doesn't sound rational to me. I live in the natural real world. When you die your electrical brain waves die with you. I don't believe in ghosts, spirits or reincarnation. Enjoy your memories and the good times you had.

Most of my life I was happy with "there's nothing out there." Mostly because I didn't think about it much. Now that I've gotten older, perhaps wiser, and questions like this come up and "it's all meaningless" just doesn't seem quite good enough any more. On the other hand, I now have a knee-jerk aversion to anything to do with "God," and religion, because every time I see it, it's associated with some truly abhorrent view or act.
This is actually freeing, because I find the cosmology of the mainline religions unbelievably childish and cruel, but also because that allowed me realize that it's not either or, religion or materialism. There are an infinite variety of other options out there. For instance, the empirical evidence for reincarnation and psi phenomena, and the transformative nature of near death experiences, all point to a reality that is much bigger that we've been allowed to believe, one that stands in stark contrast to what religions tell us.
My friend, you are free to believe whatever makes you happy. You don't need approval or some kind of certification that you haven't violated some atheist dogma or other. Anyone here that gives you a hard time about that is too concerned with being "right" to worry about. If it gives you comfort to think that maybe you will see your dog again, go with it, no one can prove you wrong. It makes the world a kinder place.
Take care.

I live my life not knowing a lot. And that's ok. One thing I like to think about is what happens after this life. Reincarnation has always been an interesting concept to me. And you know... I like to think that maybe I'll live another life to reconcile this one. And does that hurt anyone? Does it really matter if I believe that? No, it does not. So if you want to believe that you'll be reunited in some way, then you have the right to. And I'll support you in that!

Aside from everything said. The loss of my dog. Well, over the years, dogs. has bee sometimes been harder on me than some people I've known that have passed. I've never had a more loving, and loyal friend, than, Gretchen, Willson, and Deuce. My BFF's for life.

well, about the reincarnation bit, sorry, no evidence, and the energy can be spent in other ways, released as energy the way a light bulb releases heat, but doesn't create a new light bulb in doing so. however, i am very sorry for your loss.

g

You miss your dog. That's very clear. Loss makes us contemplate all sorts of things, but it's okay too to just grieve. If such things exist, they are way beyond our comprehension; maybe your mind just needs to move through this in order to find solace.

Give another dog a place to be. She'd want that. Its just the way dogs are.

We can never be at the exact same starting point. The first law of thermodynamics is the conservation of matter (can never be created or destroyed) but the second is that the sum of all entropy is always increasing. The order/ organizational state of the energy (aka life) cannnot be replicated. The things that have been, can never be again, which is what makes memories so cool... we can record stuff.

If a tree falls and rots and a new tree grows in it's place, in that soil, would you prefer to call it a new tree or the old tree reborn?

I understood. I'm very sorry you lost an important member of your family. Wishing you peace and comfort. I'm afraid it would take evidence of such in order for me to believe that death is anything more than total cessation of existing consciousness without hope of rejuvenation, reincarnation, or reanimation. Grief causes us to wish otherwise, which is why the idea of an afterlife is religion's most tenacious argument.

Oh I am so dreadfully sorry.

The answer is a bit more complex than that. The conservation of energy doesn't mean that you can't be recreated after death, it just means that the mass and energy that you were made of never ceases to exist. What must be considered is entropy- the ever increasing quantity by which all things become more disorganized and chaotic over time.

If you have every molecule of air in a room in one corner, you would expect the air to rush out to fill the room, because it is more likely that air is randomly distributed throughout the room than in one corner. You could harvest energy from this motion, in fact everything that produces or consumes energy isn't really making or using anything new, it is just sitting between a potential and it's ground state in such a way that it does what we want it to do. To push something into a higher state, you must provide more energy than was harvested from the motion to make up for system losses.

However there is a catch, there is nothing in physics that prevents everything from randomly reducing itself to a high potential. For example, the molecules of air in the room could spontaneously move bask into the corner, it's just incredibly unlikely that this will happen. In fact, given enough time it is guaranteed to happen.

So to answer your question, there is nothing in known physics explicitly preventing something that has already existed to exist again.

As an agnostic, I take reincarnation as a possibility. There's no proof for yes or no, so...

Okay, This is reminds me of an argument I haven't heard in over 30 years. Basically the argument is between science and theology.

The physist says all things are predictable because of physics and the priest disagrees, stating the point, free will changes everything.

Here is the best way I can think of to compare it to your situation. Visualize 10 jars. In each jar place the Big Bang. According to the physist all 10 jars will produce the same results, regardless of when the Big Bang occurred in each jar. So if the Big Bang happens a million years apart in each jar, it doesn't matter. In each jar, you are there at one point with your dog. (I am genuinely sorry for your loss by the way.)

The priest says, "no". The priest is probably right because of the Butterfly Effect. The universe is predictable until intelligence evolves.

To understand the priests perspective imagine a mouse like creature sitting at the base of a mountain 80 million years ago. While most of its decisions are based on instinct, thus most of it's decisions are based on physics, there comes a point, likely many times, where it chooses the direction it takes. In this example the mouse like creature went right instead of left. That option led it into the mouth of a T Rex. Poor mouse. But good thing for you and me. Because maybe, had the mouse gone left, you and I would have tails and your dog would have never existed.

Hope this helps and you get back on the road to fighting the evils of religion. Also, as a side note, I don't believe in the Big Bang, "Theory".

Your belief is YOURS. If it comforts you, well, there is no crime in it. Sorry you lost your dog; we all know how hard it is.

I'm a big fan of transhumanism, and "curing" death with technology. Among other things, when scientist manage to inject regenerating nanites or something into patients, religion won't have anything at all to offer. That's the beautiful future I work towards

I have no faith as an agnostic atheist. I know some people that are convinced of reincarnation and the recycling of life force makes sense to me on some levels, but would have no idea how to even begin to explain it.
Personally when I lose someone I grieve the fact that I’ll never see them again, but celebrate the time that we had. Eventually I learn to mainly remember them with fondness hopefully, although sometimes tears come unexpectedly.

In an almost limitless universe, nearly anything is possible, barring extreme statistics, but when I look at the world, I see a level of brutality, the cold hard facts, evolution, a universe where the greater part of it, by vast majority is hostile to life, and I find it difficult to convince myself of anything beyond. Counter to that is the small sliver of beauty you see in the universe, the goodness you find in people, and the whole mystery of life, which so far has proven to be unravelable by our science . . . . As an agnostic, I leave that door open, but it is nothing I would ever entertain as having any great possibilities without some real, tangible, forthcoming evidence.

Too deep for me...when I lose a friend..I get drunk for three or four days, bawl my eyes out, go find another...I feel fortunate for the years between. Good luck.