I could be totally wrong but

The very real fact that all observable science requires is that pressure is sealed by a container

That we experience and can demonstrate

ah the vacuum argument

Nothing about space is something we can demonstrate

as in?

The medium is a fairytale

We can demonstrate that rockets work in vacuums

exactly

plus

the atmosphere isn't a constant pressure

it gradually decreases in pressure with altitude

which proves that it is possible to go into space

Via rocket

so there's no huge pressure difference between the edge of our atmosphere and the beginning of a near-vacuum that is space

Oh yeah well my unicorn knows how to use a time machine

?

Rockets don't thrust in vacuums unless you can create a medium to push off

They thrust off themselves

And then it wouldn't be a vacuum

it's not a perfect vacuum

You simply cannot demonstrate it

https://m.youtube.com/watch?v=GxBRQXxBRic

rockets work

@Rigg5

by seperating matter from the craft

this creates kinetic energy

Even if you COULD demonstrate it, your medium doesn't exist

that applies thrust to the craft

So you created a boat with no water

no medium is required

think about it like this

let's say

you are in space, floating, right

no gravity, for all practical purposes a vacuum

now imagine

If you think that small tube is a vacuum you are not being honest with yourself

in front of you, is a large block

if you push off the block

you and the rock will both move in opposite directions

the same is happening with a rocket engine