How to use in-sentence of “doubtful”:
+ You must needs go along with us; we will wait for you, we will lend you our help, we will deny ourselves of some things, both opinionative and practical, for your sake; we will not enter into doubtful disputations before you, we will be made all things to you, rather than you shall be left behind.
+ It is a scientific name in zoology which is of unknown or doubtful use.
+ Material which is doubtful and harmful may be removed quickly, rather than tagged.
+ In the case of text that appears false or doubtful and is not part of a biography of a living person then move such text to the discussion page and ask for citations of previous research there, otherwise remove it.
+ I remember we removed all pages on individual buildings in the City because they were being put up by a doubtful source of some kind.
