In information theory and machine learning, information gain is a synonym for "Kullback–Leibler divergence".
 However, in the context of decision trees, the term is sometimes used synonymously with mutual information, which is the expected value of the Kullback–Leibler divergence of the univariate probability distribution of one variable from the conditional distribution of this variable given the other one.
The McDonald–Kreitman test is a statistical test often used by evolution and population biologists to detect and measure the amount of adaptive evolution within a species by determining whether adaptive evolution has occurred, and the proportion of substitutions that resulted from positive selection (also known as directional selection).
 To do this, the McDonald–Kreitman test compares the amount of variation within a species (polymorphism) to the divergence between species (substitutions) at two types of sites, neutral and nonneutral.
 A substitution refers to a nucleotide that is fixed within one species, but a different nucleotide is fixed within a second species at the same base pair of homologous DNA sequences.
 A site is nonneutral if it is either advantageous or deleterious.
 The two types of sites can be either synonymous or nonsynonymous within a protein-coding region.
 In a protein-coding sequence of DNA, a site is synonymous if a point mutation at that site would not change the amino acid, also known as a silent mutation.
 Because the mutation did not result in a change in the amino acid that was originally coded for by the protein-coding sequence, the phenotype, or the observable trait, of the organism is generally unchanged by the silent mutation.
 A site in a protein-coding sequence of DNA is nonsynonymous if a point mutation at that site results in a change in the amino acid, resulting in a change in the organism's phenotype.
 Typically, silent mutations in protein-coding regions are used as the "control" in the McDonald–Kreitman test.
The meaning of vergence in modern structural geology usage is unclear.
 Vergence has been used to indicate the direction in which an antiform or synform is inclined or overturned, and it has been used to indicate the sense of motion along a fault.
 These two usages of vergence are not compatible, because one means rotation, and the other displacement.
 Vergence in a non-geological context means rotation (e.g., convergence means rotation toward, and divergence means rotation away).
 The confusion has likely arisen because fold-and-thrust belts contain faults that contribute to fold rotation.
 Geologists might reduce confusion by stopping use of vergence to mean displacement.
 For fault displacement, syntax like "southeast-directed fault" could be used to indicate the direction of motion along a fault, reserving "southeast-vergent fault" for a fault that has been rotated.
 A "southeast-vergent" fold refers to a fold rotated toward the southeast, and does not mean a fold that has been displaced to the southeast.
A truth-bearer is an entity that is said to be either true or false and nothing else.
 The thesis that some things are true while others are false has led to different theories about the nature of these entities.
 Since there is divergence of opinion on the matter, the term "truth-bearer" is used to be neutral among the various theories.
 Truth-bearer candidates include propositions, sentences, sentence-tokens, statements, concepts, beliefs, thoughts, intuitions, utterances, and judgements but different authors exclude one or more of these, deny their existence, argue that they are true only in a derivative sense, assert or assume that the terms are synonymous,
Divergence is a 2005 Hong Kong action-crime film produced and directed by Benny Chan, from a screenplay by Ivy Ho.
 The film stars Aaron Kwok, Ekin Cheng and Daniel Wu.
Ekin Cheng (born 4 October 1967) is a Hong Kong actor and singer.
 Early in his career, he used the name Dior as a first name (because that was what it sounded like when his younger sister tried to call him 二哥 in Cantonese).
 He has also been referred to as Noodle Cheng, (鄭伊麵) after a popular noodle product with a similar name and his wavy long hair.
 Currently Ekin is the name used.
Roland Morris "Fatty" Taylor (born March 13, 1946) is an American former professional basketball player.
 A 6’0" guard born in Washington, D.C. and an alum of La Salle University, Taylor joined the American Basketball Association in 1969.
 After one year playing for the Washington Capitals, he moved on to the Virginia Squires, with whom he spent the prime of his career, tallying 3,495 points, 1,737 assists, and 1,715 rebounds in five seasons.
 Taylor became known as one of the few outstanding defensive players in a league known primarily for a "run-and-gun" style.
 On the Squires Taylor played with former or later NBA stars including Adrian Smith, "Jumbo" Jim Eakins and Julius "Doctor J" Erving.
 For one-and-a-half seasons Taylor was a teammate of George Gervin, and Taylor has been credited with coining Gervin's nickname "The Iceman" (he first called Gervin "Iceberg Slim", which gradually developed into the more familiar nickname).
 Taylor spent one season in the NBA (1976–77) as a member of the Denver Nuggets, and he retired in 1977 with combined ABA/NBA totals of 5,098 points, 2,563 assists, and 2,524 rebounds.
The Shaky Isles or Shaky Islands is a nickname for New Zealand.
 At one time this nickname was used in New Zealand itself, though its usage there is now seen as dated; it is still fairly widely used in Australia.
Bombingham is a nickname for Birmingham, Alabama during the Civil Rights Movement due to the 50 dynamite explosions that occurred in the city between 1947 and 1965.
 The bombings were initially used against African Americans attempting to move into neighborhoods with entirely white residents.
 Later, the bombings were used against anyone working towards racial desegregation in the city.
 One neighborhood within Birmingham experienced so many bombings it developed the nickname of Dynamite Hill.
Fritz X was the most common name for a German guided anti-ship glide bomb used during World War II.
 "Fritz X" was the world's first precision guided weapon deployed in combat, and the first to sink a ship in combat.
 "Fritz X" was a nickname used both by Allied and Luftwaffe personnel.
 Alternative names include Ruhrstahl SD 1400 X, Kramer X-1, PC 1400X or FX 1400 (the latter, along with the unguided PC 1400 ordnance's "Fritz" nickname, is the origin for the name "Fritz X").
 Along with the USAAF's similar Azon weapon of the same period in World War II, it is one of the precursors of today's anti-ship missiles and precision-guided weapons.

Question: What nickname was used by one of the stars of Divergence?
Answer: Dior