Theory Practice Relativity Travel Faster Light Conflicting People

• according to the theory of relativity, nothing can travel faster than light.
• the debate is centred around two conflicting theories.
• the theory and practice of language teaching
• literary theory

theory

1. a formal set of ideas that is intended to explain why something happens or exists
• According to the theory of relativity, nothing can travel faster than light.
• The debate is centred around two conflicting theories.
2. the principles on which a particular subject is based
• the theory and practice of language teaching
• literary theory
3. an opinion or idea that somebody believes is true but that is not proved
• see also conspiracy theory
  https://www.oxfordlearnersdictionaries.com/definition/english/conspiracy-theory
• I have this theory that most people prefer being at work to being at home.
4. used to say that a particular statement is supposed to be true but may in fact be wrong
• In theory, these machines should last for ten years or more.
• That sounds fine in theory, but have you really thought it through?
• ‘Aren’t you supposed to be retired?’ ‘Yes, in theory.’

Extra Examples

• Current feminist theory consists of several different trends.
• Each school has its own set of theories.
• Einstein’s general theory of relativity
• He has a theory about why dogs walk in circles before going to sleep.
• His comments are just abstract theory and show little understanding of the realities of the situation.
• In theory, these machines should last for ten years.
• Keynes misinterpreted the classical theory of interest.
• One of her pet theories is that people who restrict their calorie intake live longer.
• Police are working on the theory that the murderer was known to the family.
• a conspiracy theory about the princess’s death
• a grand unified theory of the physical forces governing matter
• the distinction/relationship between theory and practice
• the dominant strand of postmodern theory
• the existence of a grand unified theory that determines everything in the universe
• According to Einstein’s theory of relativity, nothing can travel faster than light.
• Further experiments seemed to confirm this theory.
• He wrote a number of books on political theory.
• If the theory is correct, any child can be taught to be a musical genius.
• In theory, all children get an equal chance at school.
• It is a theory that cannot be proved or disproved.
• Marx’s theories of history raise one or two major questions.
• She doesn’t agree with the theory that rich people work harder than poor people.
• The theory was first advanced back in the 16th century.
• There are conflicting theories as to the very early origins of mankind.
• This is all theory so far…you’ll need to back it up with facts.
• You can neither prove nor disprove this theory.
• You will have to study both the theory and practice of education.

Word Origin

• late 16th cent. (denoting a mental scheme of something to be done): via late Latin from Greek theōria ‘contemplation, speculation’, from theōros ‘spectator’.