predictions about future technology will fall around latest possible date they can come true and still remain in the lifetime of the person making the prediction. Malthusian growth model, also referred to as the Malthusian law or simple exponential growth model, is exponential growth based on a constant rate. The model is named after Thomas Robert Malthus, who wrote An Essay on the Principle of Population (1798), one of the earliest and most influential books on population. Marconi's law empirically relates radio communication distance to antenna tower height. Maxwell's equations a set of coupled partial differential equations that, together with the Lorentz force law, form the foundation of classical electromagnetism, classical optics, and electric circuits. Meadow's law is a precept, now discredited, that since cot deaths are so rare, "One is a tragedy, two is suspicious and three is murder, until proved otherwise." It was named for Roy Meadow, a discredited paediatrician prominent in the United Kingdom in the last quarter of the twentieth century. Mendel's laws are named for the 19th century Austrian monk Gregor Mendel who determined the patterns of inheritance through his plant breeding experiments, working especially with peas. Mendel's first law, or the law of segregation, states that each organism has a pair of genes; that it inherits one from each parent, and that the organism will pass down only one of these genes to its own offspring. These different copies of the same gene are called alleles. Mendel's second law, the law of independent assortment, states that different traits will be inherited independently by the offspring. Menzerath's law, or Menzerath–Altmann law (named after Paul Menzerath and Gabriel Altmann), is a linguistic law according to which the increase of a linguistic construct results in a decrease of its constituents, and vice versa. Metcalfe's law, in communications and network theory: the value of a system grows as approximately the square of the number of users of the system. Framed by Robert Metcalfe in the context of ethernet. Miller's law, in communication: "To understand what another person is saying, you must assume that it is true and try to imagine what it could be true of." Named after George Armitage Miller. Miller's rule, in optics, is an empirical rule which gives an estimate of the order of magnitude of the nonlinear coefficient. Monro-Kellie doctrine: The pressure–volume relationship between intracranial contents and cerebral perfusion pressure (CPP) states that the