Heres are some rules of thumb:
1. If you can think of it, it probably exists, and can exist.
2. Nobody knows what absolute reality is
3. Nobody knows what advanced science is capable of
4. Everything is just a vibration in space-time
5. Science fiction often becomes science fact
Who would have have known that a uranium isotope could produce enough energy to destroy a city?
Who would have known, and some still don't know, that light rays would become weapons.
Who have known that we could be optically invisible. Some still don't know.
There is a lot of science fiction that becomes fact, in fact fiction is what inspires scientists. If you had an idea about on the cutting edge of
science from wormholes, dimension shifting, quantum teleportation, brainwave controlling, antigravity propulsion, force field shielding, designer
humans. You would not dismiss other concepts.
As for zombies, in fact it is very scientifically feasible:
1. A human brain is an information processing machine, like any other. It can be programmed like any other information processing machine. If the
program was "kill" then it would kill. That can be done through implanted chips or other sort of mind control technology that the government is
known to have.
2. DNA reprogramming is no longer in the domain of science fiction. It would be possible to reprogram the DNA by infecting a victim with an
intelligent virus, so that it becomes a mindless zombie and can infect others by contact(or a bite
3. Creating cloned armes, which is possible given the state of cloning technology, designed to kill is also feasible.
4. Reviving the dead, by reverseing the process of biological death, or adapting it, is also feasible.
Overall, zombines sounds like good science.
I am trying to think of something impossible. How about enlarging something with a special beam? Ah, wait, it sounds possible. It's all molecules
after all, all that would be needed is to enlarge everything in propotion. I got it, what about transmuting paper into gold? Ah darn, it seems they
will be able to do that with nanoengineering. Is there anything that is impossible? Do you get the point.
[edit on 17-12-2004 by Indigo_Child]