Sounds were hard to recognize, floating in the air around him without any identifiable source.

But the instruments had picked up some electrical potentials that didn't seem to have any identifiable source.

Grey propaganda is propaganda without any identifiable source or author.

With the idea of identifiable sources disappearing, the question of dating also changes its terms.

The chamber was filled with a radiant light that came from no identifiable source.

The sky is clear but smoky smelling and a fine ash falls from no identifiable source.

All loans should have at least two identifiable sources of repayment.

Our first rule is that all raw materials must be from a known and identifiable source.

He said the assertions had not been backed by solid information or identifiable sources.

The most readily identifiable source of desperate people is illegal immigrants.