1 This disease of doubtfulness and discouragement is an epidemic which soon spreads amongst the Lord's flock.

2 All doubtfulness vanished after the testimony of the key witnesses.

3 The doubtfulness of one's birthplacemakesthemost fundamental questions and ambivalence about existence(freedom and home-coming) appearillusionary.

4 Ambiguity refers literally to doubtfulness or uncertainty in expressive meaning of the text. An expression may contain multiple meanings, and this is an important technique of poetry.

5 All doubtfulness vanish after the testimony of the key witness.