When you drop a combo intentionally to attempt another combo that can potentially lead to more damage, it's not a reset, it's a bait and or mix up because there is the chance of failure due to your opponent's choices. Just because the act of stopping your combo "resets" the combo counter doesn't mean it's an actual concept. If you can exploit a hole in the game system that actually resets properties and allows you continue a combo unimpeded, that is literally a reset combo.
If you knock an opponent down and attempt a high/low/ambiguous cross over mix up as they get up and they can reaction block, that's just a mix up.
If you knock an opponent down and attempt a high low mix up as they get up and they cannot reaction block or counter, that is a 50/50 because they can still escape except it is entirely guess based.
If the damage and/or control is not guaranteed, it is not a reset. You haven't actually done anything other than play the game.
If you perform a combo or move that forces your opponent into a neutral state that can be exploited and turned into a new, inescapable combo that is otherwise against the rules of the game, that is a reset. You don't necessarily need to perform more than one hit after a reset is enabled. Essentially, a reset needs to be hit confirmed and guaranteed every time to qualify as a reset, or glitch combo, glitch link, whatever you want to call it, but just simply playing the game and micromanaging your habits to trick the player into getting more damage is not a reset, it's just playing the game.
Things like "situational reset" "blockable reset" "escapable reset" "guaranteed reset" etc are all frivolous terms cooked up by the FGC over time to prevent diminishing their characters' viability. They all have designated names that cover their meanings already and the word "reset" makes it sound more legit and intentional. A reset is a reset. The only thing that needs clarification is a standing reset which doesn't need to reset damage or move properties, other than bringing a character from the air to ground. In this case, even things like Scorpion's Harpoon or Lex's Vacuum are standing resets.
I'll use examples of some things I know.
UMK3 relaunch semi infinites are the very definition of a standing reset:
Cyrax MK9 resets embody the very concept of combo breaking:
UMK3 Cyrax resets were the precursor to his MK9 resets:
Akuma air and demon resets
Kabal UMK3 reset at 1:11
Chun Li MvC air demon "uncombo" at 19s