Disingenuity

[…]it was only his Obſervation of the Diſingenuity, and want of Integrity in this Parliament, which leſſened that Reverence to it,[…]

For example; Do you seriously believe, and mean to assert, that it is impossible for any person, even for a philosopher, to be guilty of disingenuity and falsehood, by professing to believe a sophism which he really did not[…]?