Workers are wary of speculating publicly about what may have caused their illnesses because they are not allowed to discuss their work.

Mr. Olson publicly speculated that the culprit was a police officer.

Government officials refused to speculate publicly on who had carried out the assassination.

I'm the only one in town that is not publicly speculating on who will have these jobs.

No group took responsibility, and government officials refused to speculate publicly on who might have done it.

Although Nugent has never run for government office, in the 2000s, he publicly speculated about doing so on several occasions.

People are publicly speculating that it's the Trinity computer.

Carter subsequently speculated publicly about whether he would continue as a Member of Parliament.

But they have yet to speculate publicly on how so many people could have been killed and buried - with no one apparently knowing about it.