A 'theory' is a set of ideas which claims to explain how something works.

His public career has stood for a set of ideas about race that have been at odds with the central story on the Court.

He ran a campaign that said here is a whole different set of ideas.

It was always some set of ideas that get me going.

"I have laid out a very specific set of ideas for how we bring about these changes together."

It has never been a debate about two different sets of ideas.

"This puts a whole new set of ideas on the table."

Included in all this activity is not only an event but also a new set of ideas.

Our government is a set of ideas, not buildings or people.

They developed a set of ideas known as "absolute knowledge" in order to become a Strong race.