The ambivalence was demonstrated in an impromptu debate outside a police van.

A crowd gathered and engaged in a brief impromptu debate about taxation and confiscation.

Their impromptu debate over style versus substance reflected this more fundamental question.

There is no risk of an impromptu debate between Senate candidates at tomorrow's dinner, however.

This makes the debate similar to a prepared debate for the government team and an impromptu debate for the opposition team.

Beleaguered vendors, forced into impromptu street-corner debates, decided to forget the whole thing.

The night before, Televisa had won a scoop by having the three contenders on together in an impromptu debate.

Media events included press conferences and an impromptu debate.

There on the sidewalk Lapides encountered some Christians who engaged him in an impromptu spiritual debate.

I have the impression that, in this impromptu debate which you are organising, Mr President, we are mixing everything up.