fallibly

In error-prone fashion

In a fallible manner—subject to error or mistake.

The word appears almost exclusively in contrast with infallibly: Humans reason fallibly, even when they're careful.

Where infallibly suggests certainty or divine perfection, fallibly acknowledges the possibility of being wrong.

erroneous

mistakenly

In an incorrect manner

imprecisely · faultily · unreliably · blunderingly · misguidedly · unsoundly · defectively · carelessly · clumsily · bunglingly

imperfection

flawed

Having faults or imperfections

incompletely · blemished · defectively · weakly · vulnerably · insufficiently · partially · faultily · roughly · approximately

humanly

mortally

Causing or resulting in death

weakly · frailly · imperfectly · uncertainly · provisionally · conditionally

uncertainty

doubtfully

In an unconvinced way

questionably · speculatively · approximately · provisionally · conjecturally · inconclusively · ambiguously · unpredictably · precariously

Opposites
reliability and error-proneness

falliblyinfallibly

Without possibility of mistake

unerringly · flawlessly · faultlessly · unfailingly · perfectly

Phrases
Family

infallible, fallible, fallibility, infallibly, infallibility, fallibilities

Familiarity
Top 1,000,000
Profile
Used worldwide · Timeless · Abstract · Everyday, not technical · Rated G