Visualizing for me has always been like touching something with my eyes closed. I can't "see" the object, but I have a feeling for all the shapes and contours. You can feel which way a key is in your hand and where each ridge is without having to see it. I solve geometry problems the same way. I can't see the whole thing at once, but I can move my sense of feeling across arbitrary scenes.
I can somewhat imagine a simple square or triangle but only more like feeling it in the dark without fully “seeing” it. Anything more complex, like a pretzel is out of the question, just disappears/instantly-forgotten.
My dreams can be very vivid, except for some where an object disappears if I focus directly on it.
Always wondered whether this is normal, aphantasia, or something else…
"I must not complect.
Complexity is the mind-killer.
Complexity is the little-death that brings obliteration.
I will face complexity and I will permit it to pass over me and through me.
And when it has gone past, I will turn the inner eye to see its path.
Where the complexity has gone, there will be nothing.
Only I will remain."
— Litany Against Complexity
My guess: it is a relatively safe compound with the right properties to act as a working fluid for this movement. The text linked below mentions the working fluid and the property that the vapor pressure is highly variable over the range of normal room temperatures.
reply