Genady

I think there are four. Taste and smell are variations of the same sense. OTOH, some animals sense Earth magnetic field. Some animals sense electric field. These are two other senses. One more: sense of gravity/acceleration. Isn't it another sense?

Yes, it is true. I remember some things and I don't remember some details of some other things. As I said, "many years ago"... Yes, I use different expressions in different posts. So?

"Closer to eternity"? You are always infinitely far from eternity, by definition. Regardless of how you measure a "distance to eternity", super computers cannot simulate eternity either.

I don't think we can simulate eternity on computer.

LOL. BB: Boltzmann Brain, Big Bang.

Relativity as formulated in terms of observable measurements demands the theoretical existence of points in space and time. The resolution of the singularity as a point in Einstein's Relativity is a consequence of the intrinsic limitations of observable measurements. Einstein could not make heads or tails of the singularity. This is why: to resolve the singularity as a point in spacetime is objectively incorrect. The singularity is a wave in spacetime with no upwards limit to its frequency You did not answer my question. You did not even relate to it in your reply. Did you understand my comment?

Hmm... Reminded me that the OP, @Commander, hasn't acknowledged my answer above to the last puzzle.

I suspect that they never had or lost pigmentation on the underside because it is not needed. Also possible, that an ancestor of rays was pelagic with a light underside like in manta rays, for example. The stingrays evolved to be bottom dwellers but retained the light underside of the ancestor.

Neither countershading nor "light against surface" explanations seem applicable to bottom dwelling animals, such as stingrays and countless others with similar dark-top-light-bottom coloration.

Yes, certainly could. Dark when viewed from above against the dark background and light when viewed from below against the light background. Like the explanation for the sharks which I've mentioned here: https://www.scienceforums.net/topic/128920-camouflage-examples/?do=findComment&comment=1243465. The same perhaps holds for the manta:

I don't see how the countershading hypothesis applies to the green turtle. I'd rather hypothesize that the top is dark for the camouflage purpose, and the belly is light because of lack of this purpose.

Russians fighting Russians. Ура!

Yes, not much, but recently indeed some supporting studies appeared. This is perhaps the latest, from 2020: Countershading enhances camouflage by reducing prey contrast - PubMed (nih.gov)

Sorry, I don't understand the question. My what?

Does this fact support this hypothesis?

Right. But repeating the same story does not make it truer. I don't say, it is not true. I just don't know of a good supporting evidence for it.

One more bit of information regarding the search and statistics, Bayesian or not: Robert Ballard, who discovered Titanic wreck, said authorities 'immediately knew' where to look when they heard the Titan's implosion, but it took days for an ROV to get there (yahoo.com) And another: 'Titanic' director James Cameron says the search for the missing sub became a 'nightmarish charade' - ABC News (go.com)

I see. Thank you. Such input is a significant factor. However, it is not a Bayesian update. The latter would've been an update based on intermediate results of an ongoing search, i.e., the step 6 in Bayesian search theory - Wikipedia:

@StringJunky, the article that I've linked in the previous comment, contains an answer to your earlier question:

Sorry, I don't remember the details of how it supposed to work. Perhaps, the white underbelly is just a lack of coloration, while the dark top / melatonin has a function... I'm not sure.

I think that rather than Bayesian Search Theory, this information was more helpful: Titanic director James Cameron accuses OceanGate of cutting corners - BBC News

There are several alternative hypothetical explanations for the light belly / dark top coloration, for example, thermal regulation and UV protection. I remember reading about a study that tried to test the counter-shading hypothesis "by the book": Assuming this hypothesis is correct, they made a prediction about how sharp the difference between the belly and the top should be in different environments, and they analyzed available data in this respect. The data seemed to support the hypothesis but was not yet statistically significant. They needed more data.

Yes, 8-10 hours round trip. E.g., Titanic tourist submersible goes missing with search under way - BBC News

We understand why no state exists with definite position and definite momentum. It is shown via basic calculus.

I don't see anything wrong with his post. You said, "I really don't think that I use heuristics." He replied, "You certainly use them." I don't understand what attitude it is an example of or what is there against yourself.