This can only be for one of two reasons: either the two are quite different and will require totally different theory ( and hence techniques ), or our existing theories are insufficiently general.

It was not always easy to develop theory and doctrine which would square the two conditions.

The discovery of this particle the next year removed the last two objections to his theory.

This is an example of renormalization in quantum field theory — the field theory being necessary because the number of particles changes from one to two and back again.

Others have discredited the theory about the Galilean Tekoa, citing that the difference in elevation between the two locations is not significant.

For some time Rome and Antioch have been in favor, and Blass combined both views in his theory of two editions.

Adherents of this theory argue that even when the two versions diverge, they both have similarities in vocabulary and writing style — suggesting that the two shared a common author.

In the language of valence bond theory, the carbon atoms in an alkyne bond are sp hybridized: they each have two unhybridized p orbitals and two sp hybrid orbitals.

This theory of Homer's influence on Beowulf remained very prevalent in the 1920s, but started to die out in the following decade when a handful of critics stated that the two works were merely “ comparative literature ” although Greek was known in contemporary England.

The choice between the two definitions usually matters only in very formal contexts, like category theory.

In basic electric circuit theory, when studying band-pass and band-reject filters, the bandwidth represents the distance between the two points in the frequency domain where the signal is of the maximum signal amplitude ( half power ).

Pascal was an important mathematician, helping create two major new areas of research: he wrote a significant treatise on the subject of projective geometry at the age of sixteen, and later corresponded with Pierre de Fermat on probability theory, strongly influencing the development of modern economics and social science.

The Big Bang theory depends on two major assumptions: the universality of physical laws and the cosmological principle.

A major modification to Noth's theory was made in 1973 by the American scholar Frank M. Cross, to the effect that two editions of the history could be distinguished, the first and more important from the court of king Josiah in the late 7th century, and the second Noth's 6th century Exilic history, and other scholars have detected many more authors / editors than either Noth or Cross allowed for.

There are two parts to Einstein's theory: the first part consists in the formulation of a diffusion equation for Brownian particles, in which the diffusion coefficient is related to the mean squared displacement of a Brownian particle, while the second part consists in relating the diffusion coefficient to measurable physical quantities.

In the past two decades computer analysis has contributed significantly to chess theory as understood by human players, particularly in the endgame.

It should be noted that while there are very strong connections between graph theory and combinatorics, these two are sometimes thought of as separate subjects.

Using terms from formal language theory, the precise mathematical definition of this concept is as follows: Let S and T be two finite sets, called the source and target alphabets, respectively.

Eventually in 1965, John Bardeen, Leon Cooper and John Schrieffer developed the so-called BCS theory of superconductivity, based on the discovery that arbitrarily small attraction between two electrons can give rise to a bound state called a Cooper pair.

In his two volume work The Open Society and Its Enemies, Karl Popper used the term " conspiracy theory " to criticize the ideologies driving fascism, nazism, and Stalinism.

The octet rule and VSEPR theory are two examples.

One theory is that ball lightning may be created when lightning strikes silicon in soil, a phenomenon which has been duplicated in laboratory testing.

Process theory holds that if an outcome is to be duplicated, so too must the process which originally created it, and that there are certain constant necessary conditions for the outcome to be reached.

While the Darwin Awards are named after Charles Darwin, due to his theory of natural selection, there is no evidence that the stories depicted actually represent the removal of " judgement impairment genes " from the gene pool.

Researchers in molecular and evolutionary biology no longer question this theory, although some of the details, such as the mechanisms for loss of genes from organelles to host nuclear genomes, are still being worked out.

A complementary theory suggests that the relatively small numbers of bacteria inside each insect decrease the efficiency of natural selection in ' purging ' deleterious mutations and small mutations from the population, resulting in a loss of genes over many millions of years.

This theory ( commonly associated with Jean-Baptiste Lamarck ) is now known to be wrong — the experiences of individuals do not affect the genes they pass to their children.

This theory was eventually rejected, and scientists now believe that the giraffe's neck arose through Darwinian natural selection — that ancestral giraffes with long necks thereby had a competitive advantage that better enabled them to reproduce and pass on their genes.

" Also known as the kinship theory of genomic imprinting, this hypothesis states that the inequality between parental genomes due to imprinting is a result of the differing interests of each parent in terms of the evolutionary fitness of their genes.

Another theory is that the spliceosome and the intron-exon structure of genes is a relic of the RNA world ( the introns-first hypothesis ).

The 1981 book Genes, Mind, and Culture: The Coevolutionary Process by Charles J. Lumsden and E. O. Wilson proposed the theory that genes and culture co-evolve, and that the fundamental biological units of culture must correspond to neuronal networks that function as nodes of semantic memory.

Another example is how cascade phenotype reactions, as detailed in chaos theory, arise from individual genes mutating respective positioning .< ref > Campbell, Neil A., and Jane B. Reece.

Brendan Zietsch of the Queensland Institute of Medical Research proposes the alternative theory that men exhibiting female traits become more attractive to females and are thus more likely to mate, provided the genes involved do not drive them to complete rejection of heterosexuality.

The finding that much biodiversity is not due to differences in genes, but rather to alterations in gene regulation, has introduced an important new element into evolutionary theory.

In biology, chromosome inheritance theory reproduces Mendel's laws of inheritance, in the domain that the inherited factors are protein coding genes.

After flirting ( in 1973 ) with the idea that slightly deleterious mutations may be common, Tomoko Ohta, a student of Kimura, made an important generalisation of the neutral theory by including the concept of " near-neutrality ", that is, genes that are affected mostly by drift or mostly by selection depending on the effective size of a breeding population.

This theory suggested that all genes are controlled by means of operons through a single feedback regulatory mechanism – repression.

In ancestral environments, social cooperation mediated through ties of familiarity and attachments would typically have increased the inclusive fitness of genes ( the key criterion in kin selection theory ) without any form of detection of actual genetic relationships.

One evolutionary hypothesis is based on a theory that aspects of cognition are retained in one ’ s genes.

The most convincing evidence for this theory is the fact that mitochondria possess their own DNA and are equipped with genes and replication apparatus.

While the males could in theory improve the chance to pass on their genes by improving the feeding their offspring by male lactation, most of them have developed other strategies such as mating with additional partners.

According to the theory, the fetus and placenta both contain " foreign " proteins from paternal genes, but regular, preceding and coincident exposure to the father's semen may promote immune acceptance and subsequent implantation, a process which is significantly supported by as many as 93 currently identified immune regulating factors in seminal fluid.

Existing mobile genes such as plasmids and transposons support this theory.

A controversial theory of Edward J. Steele's suggests that endogenous retroviruses carry new versions of V genes from soma cells in the immune system to the germ line cells.

If, on the other hand, you subscribe to a genetic theory of relevance then the study of genes becomes relevant.

In theory, one can also trace human ancestry via a single chromosome, as a chromosome contains a set of genes and is passed down from parents to children via independent assortment from only one of the two parents.

This theory, in conjunction with natural selection, shows that organisms inherit two legacies from their ancestors: genes and a modified environment.

Standard evolutionary theory only allows for cultural processes to affect genetic evolution by influencing the individual, and depends on the ability of that individual to survive and pass on its genes to the next generation.