The subject of the lyrics has inspired speculation, some of which has been rebutted by the writer.

This observation, along with some small research studies have inspired speculation that the pill causes depression.

The depth and beauty of the night inspired religious and philosophical speculation.

The lack of eyewitnesses has inspired much speculation.

The findings have even inspired speculation about another possible extraterrestrial influence on the course of life on Earth.

Nuclear weaponry from its inception has inspired horrifying speculation.

Any neighborhood fixture inspires speculation, and Carlos's life had many gaps.

That nonvote of confidence has inspired much speculation.

The event has inspired much speculation and appears in various fictional works.

So Vermeer's images have inspired much speculation and controversy over how much science was intertwined with the art.