Editing 2898: Orbital Argument

{{comic
| number    = 2898
| date      = February 23, 2024
| title     = Orbital Argument
| image     = orbital_argument_2x.png
| imagesize = 448x323px
| noexpand  = true
| titletext = "Some people say light is waves, and some say it's particles, so I bet light is some in-between thing that's both wave and particle depending on how you look at it. Am I right?" "YES, BUT YOU SHOULDN'T BE!"
}}

==Explanation==
In this comic, [[White Hat]] is using the {{w|Argument to moderation|middle ground fallacy}} to try to make a compromise between the positions of [[Cueball]] and [[Megan]].

Cueball appears to be asserting a {{w|geocentric}} viewpoint, whilst Megan adheres to a {{w|heliocentric}} one, an argument that has actually long been settled in the latter's favor. White Hat, however, considers it {{wiktionary|politic#Adjective|politic}} to 'split the difference' and declares his intention to compromise with a 'middle' option, to try to uncritically please both parties. (Though it's probable that he may instead just equally annoy them both!)

On a naive reading, which imagines a point of common orbit midway between the bodies, his thesis is simply wrong. However, by one way of looking at it, it happens that he is also correct. Because two bodies exert equal but opposite gravitational forces on each other, each orbits around the average location of the other, and therefore they both orbit a common center. This {{w|Barycenter (astronomy)|barycenter}} is located somewhere between the centers of mass of the two bodies; the distance of each body's center of mass from the barycenter is proportional to the other body's mass. This is most apparent in systems where the two bodies have similar masses, but it is present to an extent in all orbital pairs, even when one body is far more massive than the other. For this reason, Earth does not orbit the center of the stationary Sun as described by the heliocentric model. However, the Earth-Sun barycenter is only slightly different from the Sun's own true center, still well within the Sun. It is around this which the Sun wobbles, in contrast to the way the Earth orbits around this unequally proportioned midpoint.

That White Hat has worded his compromise solution in a way that (arguably) encompasses the deeper truth of the barycentric viewpoint is not treated as justifying his mediating approach. It is clearly understood, by someone who seems to understand the complexities (e.g. a {{w|Randall Munroe#NASA|NASA physicist}}) that White Hat's 'successful' conclusion is just accidental, and such a person may therefore find this vexatious. This seems to be a case of a {{w|Gettier problem}}: White Hat reaches a true statement via unjustified logic.

The title text extends the principle of the comic's astronomical viewpoint down to the correspondingly opposing 'quantum world'. For various well-studied reasons, light is often described ''either'' as particles ''or'' as waves. White Hat's approach would be to give both viewpoints equal credit and suggest a compromising middle-ground explanation. In this case, also, he would have the {{w|Wave–particle duality|correct answer}} but, in the continuing view of an increasingly exasperated witness to his chronic {{w|False balance|"half-and-half"ism}}, not through a logical proof. Averaging predictions of experts is used to reliably improve the accuracy of the {{w|Ensemble learning|ensemble}}, as well as other methods that might produce a {{w|consensus forecast}}, so his heuristic may indeed have some validity for some types of prediction along a continuum of possibilities. But, for this case, two opposing philosophical positions do not represent the right kind of data to merge into a balanced 'best fit' intermediate predictive model.

Another example of the middle ground fallacy was used in [[690: Semicontrolled Demolition]], although in that case the person offering the compromise solution was not portrayed as getting the right answer by accident.

Orbits of celestial bodies are quantified using a set of parameters called orbital elements. Some of these parameters are commonly known as arguments, such as the {{w|Argument of periapsis}}. However, these kind of arguments tend to lead to consensus rather than disagreements. Independent measurements of the arguments might indeed be combined by taking the mean (to discover the middle ground).

The Earth-Moon barycenter is located approximately ¾ of the way from Earth's center of mass to its surface, towards the Moon's center of mass. The equivalent Jupiter-Sun barycenter, meanwhile, is located just ''above'' the 'surface' of the Sun due to the masses involved being not as different (but still significantly so), and the much greater distance between them. Pluto-Charon barycenter is located completely outside of Pluto, in part because they are much more similar masses, and are thus considered to orbit each other (tidally locked) around a point approximately 5.4% along the distance between the surfaces of Pluto surface and Charon, or 11% of their center-to-center distance.

As each of the planets and the Sun are simultaneously orbiting/'being orbited' (and every planet also measurably pulls on every other, etc, even discounting every smaller and/or more distant body in the universe), the combined solar-system's barycenter is a less simply-defined point (that being more likely to be within the Sun, at any given point of time), which can often be considered to more simply average out to "<each planet> orbits the Sun" for most purposes.

==Transcript==
:[From left to right, Cueball, White Hat and Megan standing. Cueball and Megan are arguing. Cueball is raising a finger while Megan's arms are outstretched. White Hat stands between them, both hands out in an equivocal gesture.]
:Cueball: The sun orbits the earth!
:Megan: The earth orbits the sun!
:White Hat: When two people disagree, the truth is always somewhere in the middle. Maybe the earth and the sun orbit a common center!

:[Caption below the panel:] 
:It's annoying when people are right by accident.
{{comic discussion}}

[[Category:Comics featuring Cueball]]
[[Category:Comics featuring White Hat]]
[[Category:Comics featuring Megan]]
[[Category:Astronomy]]
[[Category:Physics]]
[[Category:Logic]]
[[Category:Compromise]]