I don't know if you saw my reply, since it was at the foot of the previous page.
It just seems weird to me to say that viruses aren't alive. I mean, they're germs, right?
I mean, I get that they might not be considered alive, I just mean that it seems intuitive to me that they would be.
Scary Librarian | Hot Librarian | Spooky Silent Library | The Library Of BabelI consider viruses like little malevolent robots that aren't under anybody's control. I suppose you'd have to consider robots to be alive when they stop acting under human control?
I guess if you consider both to be alive, then that's consistent. It'd just be inconsistent to consider one to be alive and not the other, to me.
IIRC, isn't the mechanism by which virus reproduce pretty unique? Other parasites don't hijack their host DNA... right? Or maybe I'm just making stuff up.
edited 31st Jan '11 8:47:52 AM by melloncollie
I mean nothing of the sort, Bobby. I am speaking of a being very much like a human. In fact, exactly like a human, except that it doesn't age or decay. The destiny of the species, in other words.
My name is Cu Chulainn. Beside the raging sea I am left to moan. Sorrow I am, for I brought down my only son.I'd consider robots that could evolve and reproduce to be functionally alive, yes.
And I think that's right, mellon.
Diamonnes, such a human being would still be composed of cells and still capable of reproducing (and therefore evolving).
Scary Librarian | Hot Librarian | Spooky Silent Library | The Library Of BabelWikipedia clearly don't class viruses as alive, although they do say "most often considered". Hm.
Scary Librarian | Hot Librarian | Spooky Silent Library | The Library Of BabelWell, I for one am just irked that the technical definition of "life" seems to be narrower than the one I've been using, though I suppose I have only myself to blame for that.
This post seems to get stupider and stupider the more times I read it.
edited 31st Jan '11 9:06:35 AM by BobbyInTheLibrary
Scary Librarian | Hot Librarian | Spooky Silent Library | The Library Of BabelBiologists use a narrow definition of life so that they don't have to examine crystals all day.
[1] This facsimile operated in part by synAC.First off, there's a difference between "alive" and "sapient." An immortal being could easily be capable of reasoning, feeling pain, etc without necessarily being considered "alive". It doesn't seem all that odd to me not to file something incapable of dying as "not alive." If you think of "alive" and "not" as two separate rooms, zombies, virii, and immortals are standing halfway between the two in the doorway.
They lost me. Forgot me. Made you from parts of me. If you're the One, my father's son, what am I supposed to be?To my mind, there's a pretty substantial difference between a washing machine and a virus in terms of lifelike characteristics, but OK.
Welcome To TV Tropes | How To Write An Example | Text Formatting Rules | List Of Shows That Need Summary | TV Tropes Forum | Know The StaffViruses act to get cells to produce more viruses, rather than reproducing themselves. The problem with admitting this abstract sense of self-reproduction is that you could admit anything even remotely self-perpetuating, like those signature lines that say «90% of teenagers have used drugs. Copy this into your sig if you're in the 10% that haven't». The problem with not admitting it is that plenty of forms of life, while capable of producing larval forms of them selves in-this-sense-independently, can't survive in larval form without other life-forms to leech resources from.
[1] This facsimile operated in part by synAC.Not only have you completely won this thread with this post, you have bridged the gap between the Infected and the 'true' undead, thus solving several burgeoning flame wars on the internet forever. Huzzah!
This thread now makes sense to me. I thank you.
- Is it possible for a being without cells to be alive? Are prions
single cells, or something else? Are they alive? What about God, assuming God exists?
- If a being can do anything another living thing can do (eat, grow, etc.), but not reproduce or evolve, is it by definition not alive? What about a hybrid that is sterile?
- Many creatures of legend do reproduce. For example, in Greek Mythology, even gods reproduce. In Tolkein's backstory for The Lord Of The Rings, elves reproduce, even though they also live (in at least some cases) for many thousands of years.
- In Drowtales magic actually causes evolution to occur at an accelerated rate. In the lifetime of the oldest elves they have seen the evolution of new subspecies of elf.
- But what is immortality? I suppose you could call the Emortals from The Third Millenium Immortal. But their life expectancy is estimated as "only" around 500 or so. Tolkein's elves can only be killed by being slain in battle, supernatural illness, or "having tired of life after 10,000 centuries."
My, most favourite definition of life ever, given to me by my freshman biology professor, loosely quoted from Schrodinger:
Life is any system that resists an increase in entropy.
But yes, I think your teacher is mistaken in claiming things that don't evolve are not alive, seeing as individuals do not evolve. Evolution is a change in a popolation's frequency of alleles; it's not something an individual organism does.
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I like Zoulza's definition.
"But yes, I think your teacher is mistaken in claiming things that don't evolve are not alive, seeing as individuals do not evolve."
There's a difference between definitions applying to individuals or to species.
For example, the definition of two separate species is that members of the one species can't produce fertile offspring with the other species. Either they can't reproduce at all, or create an infertile creature like a mule.
Does that mean infertile people aren't human? No, of course not. Because that definition doesn't apply to individuals, it applies to species. We use a different process to decide which species a given individual belongs to - what species your parents are, whether you have most of the major features typical of that species, etc.
If I'm asking for advice on a story idea, don't tell me it can't be done.

Mh, that kind of immortal is probably alive. But did you check that definition with your teacher?