Ashardalon wrote:no they are not
they have a preferred hand
true, a space marine is more ambidextrous than the most ambidextrous human ever
so a human would never notice the difference but if two marines do a duel and one switches to his off hand that will still be an insult
in the space wolf omnibus he switches hands then positions his legs before trowing the spear of Russ
if he was going to switch his legs anyway he could have thrown it with his left hand, if it wasnt a sacred relic he probably would have but since he couldnt afford to make a mistake he used his best hand
they do have a best hand the difference is minimal but there is a difference
the mechanicus are humans so thats just BS, their mechadendrites will be like their preferred hand but they still have a preferred hand , they just tend to replace their worst hand with an augmentic because having a worse hand is a biological weakness
eldar im not sure but they have a brain that has a left and right side similar to humans and so its probable that they do have a preferred hand, although eldar are very conscious about how they move so humans just seem to have two left hands for them so its pretty normal that to a human they will appear ambidextrous, but it is highly unlikely that they are
necrons are robots now so yes now they probably are now , doubt that they where tho
if you look at a destroyer (they are basically nihilistic necrons that have lost their identity and only care about destruction, its an infectious kind of corruption that other necrons somewhat fear similar to the corruption of the flayed ones (might be outdated tho))
they only have a cannon on one hand if they where truly ambidextrous and had that instinctively they would replace both hands with a cannon when turning into a destroyer as they only care about destruction
it makes me think that the original necrothir where not ambidextrous but that was a long time ago
tyranids seems like hive tyrants and lictors would definitely be but it sounds like a waste of resources to go trough the effort for hormagaunts but from looking at zoantropes they dont seem to have a segmented brain which is the cause of having a preferred hand so it could be that they are all ambidextrous
from what i know about orks they actually are ambidextrous but similar to how eldar looking at humans orks tend to be so clumsy that you probably wouldnt notice
but their brain is one mass, one very small mass, so they should be ambidextrous but there is little official data about ork brain composition, looking at the weirdboy crew they do seem to have a split down the middle so maybe they do have a preferred hand
im not using humans as a baseline, i use biology and basic science which have no reason not to be applicable in the 40k multiverse unless there is lore stating otherwise
scorch's explanation seems the best
There is a lot of source stating that marines can use both their hands equally well, so I would like to hear an exact quote from a page that says they can not. The Deathwatch rulebook explicitly states it so. Deathwatch Core Rulebook page 25.
This also matters because a lot of marines dual wield. In fact most marines that are not tacticals, devastators or sternguards do.
As to why Ragnar likes one hand, there is an easy explanation. He is a Space Wolf, and thus he is a superstitious barbarian. He may easily believe that he has a lucky hand, or that he just uses one hand out of sheer habit, as Space Wolves are nothing if not lovers of habits from Fenris. It can be a personal preference after decades of using one hand for melee and the other for shooting. Why break the routine if there is no reason to?
Another valid thing can be that a Space marine gets one crippled and or/replaced by an augmetic, and thus uses his whole hand.
So just because a few marines have a habit, it does not invalidate another piece of lore stating something very clearly.
The Techpriests also got a lot of their brains replaced by computers at higher ranks so this is not a problem for them either. Of course a newly joined one does not have these, but the very concept of artificial limbs must require a lot of mechanical interfacing. The Dark Heresy rulebook lets them take it when they get into the rank of Enginseer (or equal to it) . So it is not something they get out of the start, but something they gain as they get through the ranks. It is also more likely to be an upgrade for Skitarii, Magi, and lesser adepts who need to multitask a lot or need special agility.
As to why Destroyers and necrons got one weapon arm? Could be that it was easier to supply energy to one gun, to program aiming for one gun, etc. Necrontyr could have been, originally anything handed, or even clumsy with both hands.
Also, ambidexterity can be learned to a degree in real life, or in 40k, for example, for all the dual wielders out there. Sisters of battle Seraphim, Commissars and most IG heroes usually have a melee and a ranged weapon. And unless the ranged weapon is an AOE one, it will require them to have both handedness to a degree, or they will just miss.
It is also a bad idea to apply precise biology to aliens. It is usually a good idea to apply Evolutionary principles to natural species and appliable physics in a hard sci fi setting, but that's it. This is something that anybody who knows anything about biology knows. This is called this:
This states that all male dogs are left handed. Does this mean wolves are too, and if then, Wolves? I am joking here.
Applying this to genetically engineered, cybernetic, or wholly alien organisms is unwise. Just like how you can't apply modern physics to the Warp, Void Shields, Plasma Generators, Antigrav technology, etc, you can't apply hominid biology to the 40k races, especially since almost half of them had such flaws edited out of them by design.
It is a theory in scientific circles that human handedness developed due to the fact that primitive age combatants used shields and melee weapons.
Having the shield, the item that requires the less "handedness", means you can cover your heart better with it, while you can use your handedness on the right with your sword, maul, club, whatever.
So because our heart is on the left, right handedness meant that you were more likely to survive the battle, and natural selection happened.
This does not apply to space marines, as they got a heart on either side anyway. I do agree that orks can be clumsy with both hands.