A slight degree of credence, arising from evidence too weak or too remote to cause belief. Weed v. Scofield, 73 Conn. 670, 49 Ati. 22. Supposition or surmise. The idea of a fact, suggested by another fact; as a possible cause, concomitant, or result Burrill, Circ. Ev. 27.
Law Dictionary – Alternative Legal Definition
Conjectures are ideas or notions founded on probabilities without any demonstration of their truth. Mascardus has defined conjecture: rationable vestigium latentis veritatis, unde nascitur opinio sapientis; or a slight degree of credence arising from evidence too weak or too remote to produce belief.