Components of Thought

Hi, Everyone! I'm pretty new to meditation. After reading a few books* and attempting meditation a few times off and on over the years, I'm trying to commit to a regular practice. As part of that, I've been using the BrightMind app, and I read about 75% (so far) of Shinzen Young's book "The Science of Enlightenment." But I'm having a bit of a hang-up, and I wondered if anyone could offer advice / thoughts.

Shinzen Young (and Brightmind) discuss thoughts as basically arising in three main "flavors" - mental images, mental talk, and bodily sensation of emotions. I have experienced all of these, and so I agree that thought comes in these types. However, what's bothering me is that it seems to me that thought can come in additional types beyond these three, so it feels reductive to focus on these three types of thought to the exclusion of all others. Here are some examples of types of thought that seem to fall outside the bounds of mental images, mental "talk," and bodily sensation of emotions:

1. Kinesthetic memory, or thinking about the physical sensation of doing something. As a simple example, have you ever had a dream in which you touched something and could "feel" the texture of it? If you can do that in dreams, why not everyday thoughts? I used to practice martial arts, and I could remember the sequence of moves that make up a form/kata. I don't have brain scans to prove it, but I feel like the moves were in my brain as a set of physical sensations / memories of the actual movement involved, not a set of mental images / talk / emotional sensations. As another example, when I look at a lemon sitting on the table, I can imagine the texture of the peel without touching it. Surely that is not an image, talk, or emotional sensation?
2. Taste or smell - I can conjure up tastes and smells sometimes by focusing on it. Isn't that a type of thought? I admit I don't walk around thinking of tastes and smells all the time, and usually there's a visual component to my thought that helps me evoke the taste or smell, but it seems like this is a separate component of thought not addressed by the see/hear/feel paradigm. Like the lemon example: I can look at a cut lemon on the table and imagine how it tastes without putting my mouth on it.
3. Most troublingly, I think that there is some component of my thought that feels like it comes "before" image, talk, or bodily sensation. I guess I would call it "unarticulated thought." For instance, if I think about walking up the stairs to my bedroom, I don't verbalize or imagine myself doing it - there seems to be a thought process that goes on behind the scenes. If someone were to ask me what I was planning to do, I would be forced to verbalize the plan, so it would be very difficult for me to explain what the pre-verbal thought "looks like." Nevertheless, I definitely feel like I can have the "thought" of doing something (maybe creating the intention?) without verbalizing (or mentally picturing) the intention to myself.

The third one above is really tripping me up, because there seem to be a lot of examples of it. Here's another one: if someone asks me my opinion on something I haven't really given much thought to. Maybe someone asks my opinion on some complicated political or philosophical question of the day, right? Well, I don't sit and have a "mental conversation" with myself about the answer before I open my mouth and start talking. Rather, I feel like the answer is already "in there" in my brain, but unarticulated. I reason it out as I speak. The reasoning process is pre-verbal, and my speech encodes it now as a kind of mental talk... but there had to be a pre-verbal thought process that gave rise to that.

The first two items in my list fit with Shinzen Young's claim that there is a kind of symmetry between our physical sensations and our thoughts: since there are sensations of sound and visual sensation, so too are there mental sensations of the same. By that same token, since there are sensations of physical touch, proprioception, balance, smell, and gustation, there should be mental corollaries, right?

But the third item in my list posits that there is also a kind of thought that doesn't necessarily rely on sensation. I would almost describe it as a kind of symbolic thought. Like if you see a big red plus sign and mentally associate that with ambulances: you don't necessarily have to picture the ambulance or mentally say the word "ambulance" to make that association when you see the symbol. There is an unarticulated kind of thinking that is going on behind the scenes.

Does mindfulness meditation not focus on these kinds of thought because it's impractical (i.e., it's much more challenging to notice and label, and ultimately it's not necessary to be able to do so) or because it doesn't actually exist (i.e., it's kind of a mental illusion - my consciousness confabulating a non-existent thought process after the fact to try to explain the origin of whatever thought I just had)? Or is there something else going on here?

Or maybe mindfulness meditation DOES encompass these kinds of thought, but my BrightMind app hasn't introduced them to me yet because I've only been doing this for a month? Or maybe this is just something weird about Shinzen Young's system?

Any help would be MUCH appreciated!

*The books in question have been "Meditation for Fidgety Skeptics" by Dan Harris, "Why Buddhism is True" by Robert Wright, and "The Science of Enlightenment" by Shinzen Young, along with a lot of neuroscience stuff, mostly by Oliver Sacks.