Some writers have speculated that he was suffering from tertiary syphilis.

Many writers have speculated on the ways in which a friendly civilization might interact with humankind.

Some writers have also speculated that green symbolises a bright future, and growth.

Several recent writers have speculated that Arius may have been poisoned by his opponents.

Baseball players, managers, and writers have speculated about bias by the official scorer for decades, but this subject has been objectively studied only recently.

Some writers speculated that she also suffered some spiritual ordeal or artistic crisis.

Some writers have speculated that reading about such warriors inspired his criminal ambitions.

One writer has speculated that this might have been a leper niche and window.

Some writers have speculated that the painting depicts a marriage ceremony, with the attendant tradition of jumping the broom.

The writer speculates on a German origin; others say Yiddish.