How would Madeline prove to others that Badeline exists without going to a mountain?

[dusty gyro]

does this work

[quasi oasis]

take a picture at celeste mountain

[onyx cove]

lol

[iron juniper]

so there's this concept called a 0 evidence proof

wait I'm not actually sure this case is a valid one

[vivid minnow]

In the mirror temple

[snow laurel]

Bring part of fhe mountain back

Bring mountain rocks home
Better yet, keep core rock or heart or etc and keep them close to body

That also allows madeline to dash anywhere

[languid warren]

surgically replace real heart with a crystal heart

[chilly harbor]

and subsequently die?

[dusty gyro]

i dont think life logic doesnt apply to that

[dusty gyro]

The mountain itself, her will to climb it and her anxiety probably is why she has the dash powers and badeline

So i dont think a reminder works as well as being there

Besides she has dealt with her current issues already

i think

[snow laurel]

Just the mountain wont work then, maybe that's why theo and other characters can't dash

[toxic void]

Take a picture.

[snow laurel]

Theo witness