“We could tell them [alien civilization] things that we have discovered in the realm of mathematical physics, but there is stuff that I would like to know. There are some famous problems like how to bring gravitation and quantum physics together, the long-sought-after theory of quantum gravity. But it may be hard to understand the answer that comes back.” KnowsMayLongHardProblemTogetherStuffAnswersTheoryCivilizationPhysicsAliensMathematicalRealmsGravityQuantumQuantum PhysicsGravitation Author:Paul Davies
“By having simplified what is known, physicists have been led into realms which as yet are anything but simple. That at some time, they, too, will appear as simple consequences of a theory of which no one has yet dreamed is not a statement of fact.It is a statement of faith.” Has BeensFactsSimpleKnownTheoryConsequenceStatementsRealmsPhysicist Book:The Pursuit of Simplicity Source: The Pursuit of Simplicity
“Those who say theory and practice are two unrelated realms are fools in one and scoundrels in the other.” TwoPracticeTheoryFoolRealmsScoundrelsTheory And Practice Book:Letters of Ayn Rand Source: Letters of Ayn Rand
“When I worked on the polio vaccine, I had a theory. I guided each [experiment] by imagining myself in the phenomenon in which I was interested. The intuitive realm . . . the realm of the imagination guides my thinking.” ThinkingImaginationTheoryGuidesExperimentsRealmsPhenomenonIntuitiveVaccinesPolioPolio Vaccine Author:Jonas Salk
“A hypothesis is empirical or scientific only if it can be tested by experience. A hypothesis or theory which cannot be, at least in principle, falsified by empirical observations and experiments does not belong to the realm of science.” IfsDoePrinciplesTheoryExperimentsObservationRealmsTestedHypothesis Author:Francisco J. Ayala
“In the Republic Plato presents a theory of personality. ... He speaks of three faculties, the appetitive, the ambitious, and the rational. ... The most dangerous faculty according to Plato is the appetitive for it bonds the soul to the senses and the realm of sense objects.” SoulThreeSpeakDangerousObjectsTheoryPersonalitySensesRationalRealmsFacultyRepublicAmbitiousPlato Author:Thomas McEvilley