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The idea of having an ambient space-time of some specific dimension seems to play less of a role of string theory than in conventional physics, and certainly less than the kind of role that I would myself feel comfortable with. It is particularly difficult to assess the functional freedom that is involved in a physical theory unless one has a clear idea of its actual space-time dimensionality.

— Roger Penrose Fashion, Faith, and Fantasy in the New Physics of the Universe (2016)

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More quotes by Roger Penrose

Children are not afraid to pose basic questions that may embarrass us, as adults, to ask.

The Emperor's New Mind (1989)

Understanding is, after all, what science is all about — and science is a great deal more than mindless computation.

Does life in some way make use of the potentiality for vast quantum superpositions, as would be required for serious quantum computation?

Children sometimes see things clearly that are obscured in later life.

The Emperor's New Mind (1989)

It seems to me that we must make a distinction between what is "objective" and what is "measurable" in discussing the question of physical reality, according to quantum mechanics.

The Emperor's New Mind (1989)

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Quote text and notes from Wikiquote: Roger Penrose (page history), available under CC BY-SA 4.0. Source quality and labels are our own summary of what Wikiquote records.