My greatest apprehension was for mine eyes, which I should have infallibly lost, if I had not suddenly thought of an expedient.
I was assured that, a year or two before my arrival, Flimnap would infallibly have broke his neck, if one of the king’s cushions, that accidentally lay on the ground, had not weakened the force of his fall.
The case seemed wholly desperate and deplorable; and this magnificent palace would have infallibly been burnt down to the ground, if, by a presence of mind unusual to me, I had not suddenly thought of an expedient.
These creatures were of the size of a large mastiff, but infinitely more nimble and fierce; so that if I had taken off my belt before I went to sleep, I must have infallibly been torn to pieces and devoured.
It seems indeed to be a work that requires some exactness, but the professor assured us, "that if it were dexterously performed, the cure would be infallible."
The mother, out of pure indulgence, took me up, and put me towards the child, who presently seized me by the middle, and got my head into his mouth, where I roared so loud that the urchin was frighted, and let me drop, and I should infallibly have broke my neck, if the mother had not held her apron under me.
However, an unlucky school-boy aimed a hazel nut directly at my head, which very narrowly missed me; otherwise it came with so much violence, that it would have infallibly knocked out my brains, for it was almost as large as a small pumpkin, but I had the satisfaction to see the young rogue well beaten, and turned out of the room.
And the only remedy they found was, to set him to hard work, after which he would infallibly come to himself.
He told me "that sometimes, though very rarely, a child happened to be born in a family, with a red circular spot in the forehead, directly over the left eyebrow, which was an infallible mark that it should never die."
He likewise directed, "that every senator in the great council of a nation, after he had delivered his opinion, and argued in the defence of it, should be obliged to give his vote directly contrary; because if that were done, the result would infallibly terminate in the good of the public."
But the usual way of computing how old they are, is by asking them what kings or great persons they can remember, and then consulting history; for infallibly the last prince in their mind did not begin his reign after they were fourscore years old.
There is indeed another custom, which I cannot altogether approve of: when the king has a mind to put any of his nobles to death in a gentle indulgent manner, he commands the floor to be strewed with a certain brown powder of a deadly composition, which being licked up, infallibly kills him in twenty-four hours.
…for instance, that the earth, by the continual approaches of the sun towards it, must, in course of time, be absorbed, or swallowed up; that the face of the sun, will, by degrees, be encrusted with its own effluvia, and give no more light to the world; that the earth very narrowly escaped a brush from the tail of the last comet, which would have infallibly reduced it to ashes; and that the next, which they have calculated for one-and-thirty years hence, will probably destroy us.
…had like to have cost me my life; for, one of the pages having put my boat into the trough, the governess who attended Glumdalclitch very officiously lifted me up, to place me in the boat: but I happened to slip through her fingers, and should infallibly have fallen down forty feet upon the floor, if, by the luckiest chance in the world, I had not been stopped by a corking-pin that stuck in the good gentlewoman’s stomacher; the head of the pin passing between my shirt and the waistband…
There are no more uses of "infallible" in the book.