So Murray, I have been thinking and listening to other players about this, and this is what I think about your post:
Murray wrote on 12/04/18 at 14:08:56:Yes, 3 categories for rBC1 which are SC, NG & G.
In my opinion, the PP/ranking systems have made critical errors in the past regarding the classification of 3 shortcuts. Firstly, "RIW G" fits my definition of the glitch, which is stated further below. I believe the rMC2 pasta should have always been considered SC, thus never constituting towards AF and the NBC turncut likewise. I believe however that the MC pasta was intended. Nintendo knew we would be able to drive on that wall and the testers would have landed there also and notified Nintendo of it, even though Nintendo most likely knew already that it would be possible to drive on it. Yes, Nintendo probably didn't think we would have the precision to make the MC pasta faster, but that is completely besides the point. Yes, we're all here to discuss the issues on rBC1, but I felt it necessary to mention my beliefs about other "controversial" shortcut classifications.

I believe that NG (possibly changed to "NO SC") should be a category explicitly for shortcuts that were most likely intended by Nintendo. Nintendo paid people to try and break MK7/find shortcuts and that was most likely a priority after MKW's failures in that area. This means that anything obvious like rMG & rDDJ glider cuts were all intended by Nintendo. If anyone mentions the rMG gapcut being unintended, it is obviously a more optimal way of doing a clearly intended shortcut. The NBC turncut wasn't intended by Nintendo because they placed signs over the gap an attempt to prevent the cut.
Yes, there are a lot of intended shortcuts in MK7. There are also a few shortcuts that are disputable if they are intended, and that we still use for NG records. But we can only convince ourselves of what was intended or not, a task influenced by personal beliefs and not by something universally concrete. But still, all the NG shortcuts that we knew until now, the lap always counted. What actually tells us that we probably are allowed by Nintendo to continue, if we make it across.
That is also the case for the NBC turncut. You say the shortcut wasn't intended because they placed that metal plate. But the metal plate only prevents us to make the cut between that height and that height. If you understand what I mean.
The RIW ultra shortcut on the other hand, I understand why you could consider it as a glitch.
Murray wrote on 12/04/18 at 14:08:56:Nobody can give any form of an argument as to why the recently used rBC1 shortcut could possibly have been intended.
So now comes the question of whether or not this shortcut should be deemed a glitch. What is the definition of a glitch in MK7? I believe a glitch in MK7 is defined as an unintended shourtcut consisting of either clipping through something (eg a ceiling/wall) to another area of the track, or gaining an advantage due to a highly favourable respawn.
By enforcing my definitions, the rBC1 shortcut doesn't fit either of two categories currently present for this track's leaderboards (NG & G), but it fits my SC definition. The MK7 community never appeared to have any clear definitions in place which help to classify shortcuts, resulting in this confusion many years later.
On MK7 there are shortcuts that you are definitely not supposed to execute, in that case they let you respawn back where you left the track before you make it across (Rainbow Road for example, you can’t jump to the track beneath you) or another installment they have in place: your lap doesn’t count (rKC for example, there is shortcut without the lap count).
https://youtu.be/NMi4RaPqBSMOn rBC1 you can cut huge portions of the track by jumping over the lava. But also here Nintendo prohibits you to do so by not counting your lap.
Thomas found a way to make it across the lava and make the lap count anyway. Normally your lap doesn't count, what makes the shortcut unintended, like you said. But I think we should consider it as a glitch and not a new category called SC. These are the main reasons why I believe it is a glitch:
1. You can perform the rBC1 gap cut without your lap counting. You have to do it precisely right to get the lap to count.
2. You can not do it online. You can do it precisely right online, and still the lap doesn’t count. The same track, the same movement, no lap count.
These are two reasons why it is abnormal that the lap counts. The fact that it somehow counts the lap when it isn't supposed to, is the glitch.
This new glitch forces us to look further than how glitches looked like in MK7 until now. You give definitions of a MK7 glitch, but the rBC1 gap cut has no correlation to the rest of the glitched tracks. It's a new beast. Therefore it is obvious that it wasn’t comprehended in our current "rules”.
And I’m not sure if we should establish a clear ruleset of what a glitch is, like Nicola suggested. Because when we discover a new kind of glitch, like now, we should be able to address it.
Also when we would make this new rBC1 SC category, the rBC1 SC would likely be faster than rBC1 G while the glitch category stands for ‘anything goes’. It doesn’t make sense. You would make a new category that makes the other one obsolete.