Conversation so far:
smoke detectors that light up and sound an alarm are an example of what type of design
The smoke detector with an alarm that lights up is an example of universal design.
explain what universal design is
Universal design is the design of buildings, products or environments to make them accessible to all people, regardless of age, disability or other factors.
Who came up with the term universal design
The term universal design was coined by the architect Ronald Mace.
When was Ronald Mace alive
Ronald Mace was born in 1941 and died on June 29, 1998.

Question: was the man ever married
Self-contained rewrite: Was Ronald Mace ever married