In an infallible manner.

A person who, or an object or process that, is taken as being infallible.

Without fault or weakness; incapable of error or fallacy. / Certain to produce the intended effect, sure.

The property of being infallible; the ability to never make a mistake.

The act or process of falling in. / An incursion; an inroad. / (countable) The area where water, storm runoff, etc., enters a storm drain.

(intransitive) To fall in. / (intransitive, astronomy) To undergo infall.

plural of infall

(astronomy) Moving towards a massive astronomical body under the influence of gravity

plural of infallibility

The quality of being infallible.