- Is supposed to be already a black hole with
12 quadrillion times the gravitational acceleration of Earth,
yet is barely cracking the pavement in front and around Kenjaku (an explanation offered for this is Yuki or Tengen’s restriction on the black hole, but this would invalidate the premise of calculating Kenjaku resisting the full gravitational force of a black hole in the first place)
- Is slowly ramping up in intensity while Supersonic+ characters have an entire dialogue segment in the meantime, which considering the fact gravitational waves travel at the speed of light and that material so close to the ‘black hole’ would be immediately accelerated to a large fraction of the speed of light, this would imply Yuki and Kenjaku have yapping abilities millions of times faster than their listed combat speed
This is one of the points that was already outlined in both the OP of the CRT and in the older CRT thread. While it’s true that the Black Hole in the scene doesn’t immediately destroy the pavement and environment at the exact speed one might expect from a real astrophysical black hole, this falls in line with a common issue in fictional portrayals known as PIS (Plot-Induced Stupidity) when black holes are depicted within Earth-like settings.
The VS Battles Wiki’s own black hole page acknowledges this, stating that “Black holes in fiction are some of the trickiest things to analyze, because it is often difficult to determine if it is a ‘real’ black hole, or just some kind of black hole-ish void. Since black holes in fiction rarely conform to the actual physical properties of their real-life counterparts.” It also notes that “Small black holes produce gravitational shearing forces capable of tearing apart any kind of matter at the subatomic level (of course, within fiction, there are exceptions).” This means that fictional portrayals of black holes occasionally display selective or delayed destruction, and that in itself isn’t a valid reason to disqualify it as a black hole. Furthermore, the
Wiki’s standards clarify that “Aside from recognizing what is not a realistic black hole, it is also important to figure out what might be a black hole in the first place. Under normal circumstances, if a character encounters something resembling a black hole, there will be a statement regarding that. If the statement is from a reliable source and it doesn't behave in an unrealistic manner as outlined previously, it can be safely assumed to be a proper black hole.” In this case, the feat clearly meets those criteria: it’s referred to as a black hole in the manga itself, shows the visual appearance of a black void event horizon, demonstrates a gravitational pull on matter, is created through increasing density, directly references the scientific concept of compressing Earth into a black hole, and affects both mass, gravity, and time as stated by the characters. The temporary delay in environmental destruction is a standard trope for fictional black holes depicted in earthbound settings and doesn’t invalidate the destructive assumptions or classification of the feat.
- Is supposedly being continuously fed by a character whose entire torso is naught but a black hole now (and if the calculated diameter was actually accurate shouldn’t have a head either) and yet is still yapping and using her technique despite the fact her remaining body literally borders a supposed black hole and would be instantly spaghettified, while the lack of torso should mean she is dead already regardless
Yuki not being instantly destroyed by her own Black Hole is due to her own cursed energy, as seen with Gojo who, when caught near the blast of Hollow Purple, commented that he survived because the attack was made from his own Cursed Energy, mitigating its effects on him. The same principle applies to Yuki, her CE would naturally mitigate the immediate effects of the Black Hole and its gravity on her body while she maintained control over the technique. Additionally, characters in JJK have repeatedly survived extreme, normally fatal injuries for brief periods through both Cursed Energy reinforcement and sheer willpower. Yuta remained alive after being bisected, Yuki herself survived a massive hole in her stomach and persisted briefly after being cut in half, and Hakari endured having his torso blown apart to perform another Domain Expansion.
So Yuki briefly surviving the Black Hole isn't a counter to the validity of it.
Black Hole Calc Issues
- Is
sharply non-spherical, with giant spikes coming out in all directions (with one such spike being used to measure a diameter, which causes its own problem) despite generic black holes being perfect spheres in absence of the case of a slightly oblate spheroidal shape in presence of extreme angular momentum, or the theoretical case of a momentary toroidal phase, neither of which can explain giant spikes either (will get into the offered counter-arguments to this below)
Black Hole Topology
Your sources do not say what you want them to say.
Your first source only talks about the highly dynamical deformation of black holes in the context of
black hole collisions, not the birth of black holes.
Your second source discusses a theoretical non-generic
toroidal phase for non-axisymmetric black holes before snapping into a spherical shape.
Your third source discusses the dynamics of the event horizon and not a dynamic macro-scale topology, and has this to say on the topic at hand:
Your fourth source also discusses the dynamics of the event horizon and not a dynamic macro-scale topology. It also explicitly uses a
spherically symmetrical black hole as its model while discussing its dynamical horizon throughout the entire paper. Once again, a dynamic event horizon does not mean a non-spherical topology.
The first source discusses dynamical horizons generally, not only in mergers. While it primarily uses mergers and accretion as familiar examples (since those are easier to model numerically), the core concept of dynamical horizons forming and evolving applies equally to black hole formation by collapse, as the physics of marginally trapped surfaces and their evolution is the same in both cases.
This is precisely what I argued. During dynamical formation phases, transient non-spherical horizon topologies are physically allowed, and this paper confirms it happens in dynamical, non-axisymmetric collapse scenarios.
Regarding your statement that source 3 discusses only the dynamics of the event horizon and not a dynamic macro-scale topology, a closer reading reveals a more nuanced perspective directly relevant to the fluidity of black hole boundaries during formation. The paper's primary focus for
dynamical black holes is on trapping horizons, precisely because, as it states, "The textbook theory of black holes, however, mostly concerns stationary black holes or physically unlocatable event horizons," making them problematic in evolving scenarios. While it does affirm that "realistic black holes are topologically spherical" for compact marginal surfaces under general conditions, this refers to their fundamental manifold structure. Crucially, the paper also explicitly considers alternative topologies, stating: "If degenerate horizons are considered, then toroidal topology is just allowed, but highly non-generic, in particular Gaussian flat, and so presumably unstable." This directly addresses the concept of different macro-scale topologies, showing it is a considered possibility within the framework, even if non-generic. Thus, the paper not only shifts focus from the unlocatable event horizon to dynamic trapping horizons but also acknowledges that non-spherical topologies are theoretically allowed, further supporting the idea of complex, non-rigidly spherical black hole boundaries during formation.
forth source focuses on the apparent horizon, explicitly stating that the "event horizon... is not something that can be defined in dynamical spacetime." While the model might originate from spherically symmetric solutions, the paper's core findings describe the apparent horizon as dynamically changing its nature (spacelike, null, timelike) and even shrinking. This dynamic behavior means the horizon is not a static, perfectly spherical geometric object during its evolution, implying geometric deformation regardless of initial symmetry.
Um you don't multiply up the speed for large size dude by how much bigger it is than the normal sized guy not by default anyways. You need to prove he has subsonic walking speed if you're going to do it like that otherwise you have to stick to the default which in this case is just that 1.3m/s value
Strange, it didn't like, I've linked it now.
Strange cus the resistance of the Black hole for Kenjaku calc is accepted right?
Mathematically it's been accepted, however, the discussion now revolves if it was a real black hole or at the time.
At this point we should just remove the black hole from the page call it fake, it would be better argument and just clean everything up, honestly. I think
@Tago238 made the best point on this front
