Prove the lab can't take hit points? How can any of us do that? It's not like we can go take a screenshot of the lab page saying "and he loses two hit points! Oh no, wait, he doesn't because that can't happen!" You can't get a screenie of something not happening, is what I'm saying.
I suspect people who think the lab took hit points may have gotten confused (back when they were newer) by the fact that your pet can have higher health than it should thanks to the healing springs. Maybe a pet had 35/32 hit points or something, and lost them, and then the person had recently labbed and thought the lab took that hp. That's just a theory, of course, but I could see a Neo-newbie making that mistake.
The only way to settle this debate (besides a statement from a TNT programmer, which I can't get right now as it's late and a holiday) is for someone to provide a screenie of the lab taking hit points.
I'll wait the answer of your insider Cranberry or the screenie of a idber luky enought to get that rare "lab event".
I'll support chicken. And insist that is just a probability too low.
Guess I'll add my 2 cents in here.
Random events can happen at any time at just about every page on neopets. I've had stats raised and lowered when I didn't know anything happened. One time I was just about to click on the finish class button for a level, I checked my stats, and found out I didn't gain anything. Nothing appeared on the page that would show me losing a level. Found out I double clicked the button. My point being you can't be sure about anything if that kind of stuff can happen. Also memory plays funny tricks on people, sometimes you remember what your hp was, get it raised and find out it seems lower than it should, only to find out later that you forgot that kq quest or re that happened.
Anyway, I've been labbing a long time also and never have had my hp lowered, defence a lot sadly but never hp. The thing is, people always want to believe it can lower hp, I mean it can do just about anything stat wise rareness not withstanding so why not hp, so when some well respected person says hp can be lowered by the lab, people get in their mind that it must, so like I said, mind can play some funny tricks.
I can't believe I'm even doing this...
Basically for anybody that knows how to do statistics and/or has a decent graphing calculator, you SHOULD know what a 2-prop Z test is. It compares 2 different proportions (in this case, decreasing HP from the lab) and shows if the difference between the proportions are different because the ACTUAL proportions are different or whether it's due to luck.
I'm just comparing the 2 known proportions...one from IDB's main page and the other from Dunsparce's petpage.
IDB's main page: 26/2608 (or 1.0%) lab ray results were decreasing HP.
Dunsparce's petpage: 0/364
So in taking out my TI-83, the probability that the proportion of minus HP from Culex's year's worth of labbing is less than the reported 1% is .0279, or 2.79%...which is statistically significant. That would mean that the actual proportion of minus HP is less than 1%...if any at all.
Of course, this is assuming that the samples were simple random samples, yada yada yada.
So why does IDB have a reported percent of 1 when it's actually different? Maybe it changed. o____o
Just my (probably useless) input.

I'm sorry, where is IDB's record of Lab Ray results? I can't find it...
And the statement that there is never a probability of 1 or 0 is untrue. There is a 100% probability that you will eventually, someday, die. There is a 0% probability that the lab will change your pet's name. Sorry, I don't like it when people get math wrong...
That said, in answer to the question that started this whole discussion, if you want to decrease your HP, the lab is not the thing to try, as you will ALMOST certainly (note that I didn't say there was absolute certainty. Don't attack me for this) gain large amounts of HP before losing any.
Idb's Lab Ray Results are
here.
Or go to "Training Guide" then Lab Ray.
I guess the answer of the lab decreasing hp will be revealed by Cran when she gets info from the Neopets programmer.
raziel_03 Wrote:I knew you would like to see the screenshot but i don't have any.
I got 2 levels, and got def and lost hp... but is more common that my lab pet change gender or get hp. I don't think TNT would recoded his "randomizer" on the lab. Saying that the lab can't take is like saying that the lab can't give an specific color (like robot). I've used the lab about 3-4 years and never got a robo-pet (and is the only way to get one, right?).
A probability law says that the probability that something happen never is equal to 1 (that means it's sure it will happen) nor 0 (it's sure it won't happen).
Also here HERE you may get an idea of how it can be posible that the sample provided by Culex may not have a data entry of this possibility. Just imagine the quantity of possible events (add or reduce each stat; ignoring how many point take/give, change of gender, change of specie, change of color (and all that colors).
wow u sure are unlucky.... i got turned into a jetsam after using the lab for about.... 1-3months. then i got turned into robot, then ghost....
Cranberry Wrote:Prove the lab can't take hit points? How can any of us do that? It's not like we can go take a screenshot of the lab page saying "and he loses two hit points! Oh no, wait, he doesn't because that can't happen!" You can't get a screenie of something not happening, is what I'm saying.
I wasn't really being literal, I was trying to point out that the burden of proof isn't entirely on my side like Novachoek is insisting... who earlier said that it was a fact that the lab doesn't reduce HP, which is, of course, impossible to prove short of TNT saying something about the issue.
I IMed snarkie but she didn't respond (that happens when she's really busy). Next time I manage to talk to her, I'll ask.
it's nearly impossible to prove a negitive due to the scientific process...
but atleast evidance shows that it's, statiscaly unlikly to loose hp on any given zap, and nearly impossible to loose over any given long term run.