Which is "common sense", not physics.as far as things are not mentioned, I assume they work like they do on Earth.
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The operating assumption is things are just like on Earth, and we do not think too hard about it when they are not (dragons…)
Again, this is "common sense", not physics.I assume I would be able to swim, just like I can on Earth
Ditto.I did not say they knew about oxygen, I said I would expect it to work the same way as here, so if I am in a closed room, I will eventually suffocate, and if I make a fire in it, that will be faster.
None of this is about physics. No one doubts that the worlds of D&D include combustion and suffocation. My posts have been about universal gravitation, the atomic character of matter, the speed of light in a vacuum, the role of oxygen in combustion, etc. No D&D text suggests or implies that these things are the same in the worlds of D&D as they are in real life. And they actually imply the opposite, due to air being an element, instantaneous travel and signalling being possible, perpetual motion machines being relatively common, etc.
This is agreement with my point. So I'm not sure why you are presenting it as disagreement.There are many implicit assumptions in everything we do in the game, and the unspoken agreement is that they work just like they work here, even if the ‘why’ could be different.