Thank you. I recorded your questions as audio and listened to them with eyes closed.
I want to first state a general observation and then answer your questions individually.
General observation
Without encouraging color (or mental color), there were two dominant experiences: sound and sensation.
However, I cannot seem to
not experience mental color. Sound and sensation arrive together with a map in space. For example: this sound ("breathing") is experienced as closer to that other sound ("distant traffic"). This sensation ("heart pumping") is experienced as between those two other sensations ("foot on floor" and "blood pumping in head").
For sound, the center of this map seems to be exactly between the ears: left, right, front, back, up, down.
For sensation, I don't know if a center is perceived, but there is a relative map perceived: up, down, and between.
Investigative questions
Can it be known how tall the body is?
If there's no color (or mental color), then the word
tall seems to point to nothing. If there is only sensation, sound, smell, or taste, then no difference in "tallness" is perceived here.
Does the body have a weight or volume?
If there's no color (or mental color), then no "volume" seems to be perceived here.
I
can experience "weight" through sensation; for example, a heavy backpack seems to "press" more on the shoulders. So there seems to be some concept of difference in "weight" as sensed in the shoulders. I also notice a difference in "weight" of the "body" when I'm immersed in water or when I'm on land.
In the actual experience does the body have a shape or a form?
If there's no color (or mental color), then there's no
shape or
form of body here.
Is there a boundary between the body and the clothing?
Is there a boundary between the body and the chair?
There is a sensation of "clothing" and "chair". However, "boundary" only has meaning here when there's color (or mental color).
Is there an inside or an outside?
Sensation seems to be of two different kinds: "inside" and "outside". When there's "blood pumping" sensation, it seems to be "inside". When there's "chair" sensation, then it seems to be "outside". However, it is not clear to me whether this is a learned association formed through (mental) color or if it always was there.
If there is an inside - the inside of what exactly?
If there is an outside - the outside of what exactly?
I don't know what the "what exactly" is. There is sensation. There are labels "inside" and "outside" that are used to separate sensations... inside: "blood pulsating", "tension"... outside: "air", "chair", "floor". However, I don't know what the "what exactly" is. There is sensation and the sensations seem to be of two different types.
What does the word/label ‘body’ ACTUALLY refer to?
What is the ACTUAL experience of the body?
What is the actual experience of a head, an eye ?
Here, without color and mental color, I would say "body", "head", and "eye" refer to certain
familiar continuous sensations and sounds: "blood pumping" sensations, and in contrast to "other" changing things like "chair sensation", "floor sensation", "air sensation". Familiar "body" sounds include various forms of breathing, yawning, singing, etc.; "other" sounds include "traffic", "birds", "rain".
Is there a witness somewhere ?
I don't know. Without color or mental color, there is sensation and sound... it's not clear to me if there is any witness there.
With mental color there is location in space of sensation and sound, and thereby also a sound center and relative position of sensation.