The whole point of the "invisible iron golem" discussion is that it is not a living creature. When not commanded to do something it sits there unmoving like a statue.
This is just a difference in the way you're imagining the golem. There's nothing wrong with that, but it doesn't mean it's the only way to imagine a golem. The flavor text that was posted up-thread by @
smbakeresq states merely that a golem without orders continues to follow its last set of orders, and if unable to do so, is just as likely to become violent as it is to "stand and do nothing". That opens up the field of what the golem might be doing pretty wide. Even then,
standing and doing nothing doesn't mean the golem is doing anything different than any other creature that's standing and doing nothing. It doesn't mean that the golem is standing as still as a statue, or that it's perfectly silent. Those are things you're imagining. There's nothing wrong with imagining it that way, but it isn't the only way to do it.
Much like a gargoyle which apparently you seem to believe cannot sit still if invisible.
An invisible gargoyle can sit still, but I prefer to leave whether it does to the result of its DEX check. You seem to think DEX checks are only for creatures that can't sit still.
With no movement dexterity is irrelevant.
This reveals a difference in our games. You seem to take a character's action declaration to remain motionless as a guarantee that it will not inadvertently make any noises, so that all that's necessary to remain unnoticed is to be in conditions that allow you to be unseen and then to declare an intention to stay silent and still. I suppose you only ask for a DEX check if a character is attempting to move stealthily, and not if it's hiding in place. I, on the other hand, don’t tie stealth to movement. Whether a character is hiding in a single location or sneaking through an area, to remain unnoticed by potential observers who are alert, the character must at least tie with a DEX (Stealth) check its enemies’ passive Perception scores.
If you cannot see a creature and if invisibility works perfectly without distortion you have to have some other sense to detect it: it's interacting with it's environment in a noticeable way*, you can hear it clearly, by touching it.
Yup, in the case of the creature failing its DEX check, the one I usually go to is hearing, although there are certain ways of interacting with the environment such as shouting or making other loud noises, leaving obvious tracks to your location, or trying to hide in a spot that you are known to inhabit, that for me would rule out the possibility of success.
Seriously, run it however you want. Time to move on.
I’m not sure if it’s intentional, but this is the second time you’ve said something like this that’s given me the impression you’re trying to get me to shut up. I’ll decide when I’m ready to move on from this topic, thank you.
*EDIT: samples of interacting with the environment might include but are not limited to: an impression on the ground if it's soft, flattened leaves with the impression of feet, tracks in the snow, a hole in water, spider webs, a bird sitting on something invisible, a layer of dust on the golem, bugs bouncing off something they cannot see, swirling dust stirred up by wind.
That’s right, I’d forgotten you mentioned spider webs. Thanks for this. I’m just wondering why you’ve argued against the possibility of the golem being detected when you admit there are so many ways that could happen.