I maintain that the point is capable of being demonstrated.
He was just going to jump after him, but was prevented by the philosopher Pangloss, who demonstrated to him that the Bay of Lisbon had been made on purpose for the Anabaptist to be drowned.
He was only vexed at parting with his sheep, which he left to the Bordeaux Academy of Sciences, who set as a subject for that year’s prize, "to find why this sheep’s wool was red;" and the prize was awarded to a learned man of the North, who demonstrated by A plus B minus C divided by Z, that the sheep must be red, and die of the rot.
"Alas!" said Candide, "dear Pangloss has often demonstrated to me that the goods of this world are common to all men, and that each has an equal right to them.
"This Pangloss," said he, "would be puzzled to demonstrate his system.
There are no more uses of "demonstrate" in the book.