controvertible

There are many reasons children and parents become alienated but you have chosen to concentrate solely upon the most controvertible and ignored the mundane albeit less sensational.

From New York Times ● Jan. 14, 2015

Some of his evidence was indeed controvertible, and much of it was questionable.

From Time Magazine Archive

There is no principle less controvertible than that the subject has the same claims on the government for support and protection, as they have on him, for obedience and fidelity.

From Statistical, Historical and Political Description of the Colony of New South Wales and its Dependent Settlements in Van Diemen's Land With a Particular Enumeration of the Advantages Which These Colonies Offer for Emigration, and Their Superiority in Many Respects Over Those Possessed by the United States of America by William Charles Wentworth

Mrs. Malaprop.—Now don't attempt to extirpate yourself from the matter; you know I have proof controvertible of it.

From The Ontario High School Reader by A.E. Marty

Almost every new-acquired territory is, in some degree, controvertible, and till the controversy is decided, a term very difficult to be fixed, all that can be had is real possession and actual dominion.

From The Works of Samuel Johnson, Volume 06 Reviews, Political Tracts, and Lives of Eminent Persons by Samuel Johnson