These hearsay claims are intrinsically undocumentable. <! NOTE: Since this term is not found in the OED or other dictionaries, numerous quotations from major, refereed academic journals are provided here to establish an authoritative usage history.
Wikipedia foundation.
Savelli family — The Savelli (de Sabellis in documents) were a rich and influential Roman family who rose to prominence in the twelfth century and were extinct in the male line in 1712. [Borengässer 1994.] The family, who held the lordship of Palombara Sabina,… … Wikipedia
documentable — adjective Capable of being supported by documentary evidence. The documentable improvement of the quality of life in this brief period has been nothing short of miraculous. Ant: undocumentable … Wiktionary
