half-knowledge

Alcorn, mulling over the cryptic half-knowledge gained from the clippings, wondered what the little psychiatrist might make of it.

Such vague, unavailing half-knowledge is often the forerunner of fruitful discovery.

To learn from this, needs the well-trained ear; and harm, not good, comes from the half-knowledge which serves but to lead astray.

And with a laugh he sauntered on, leaving Lionel to writhe there with the torment of his half-knowledge.

Our American atmosphere is vocal with the flippant loquacity of half knowledge.