presumability

Noun

 * 1) The extent to which something can be presumed or relied upon to be true.
 * 2) * 1907-1909,, Roderick Hudson/Preface
 * The prime effect of so sustained a system, so prepared a surface, is to lead on and on; while the fascination of following resides, by the same token, in the presumability somewhere of a convenient, of a visibly-appointed stopping place.