For reporters, she was an unfaltering source of knowledge, ideas and confidence.

And rather than come across as a delightfully erudite source of knowledge, he ends up sounding like a pompous gasbag.

He's also the village's main source of knowledge on the greater world.

Attached to each library a computer lab that serves as an online source of knowledge.

With a large enough ontology as a source of knowledge however, the possible interpretations of ambiguous words in a specific context can be reduced.