Johnson (1987) argued that the appearance condition makes the occurrence of fallacies too subjective since how things appear may vary from perceiver to perceiver, and it is replaced by a frequency requirement.
The appearance condition of fallacies serves at least two purposes.
These can be thought of as the argument condition, the invalidity condition and the appearance condition.
From Aristotle to Mill the appearance condition was an essential part of the conception of fallacies.
Aristotle devotes considerable space to explaining how the appearance condition may arise.
He further distances himself from SDF by not considering the appearance condition.
(Deductive) validity is replaced with the broader concept sufficiency, and the appearance condition is not included.
Finally, we notice that the appearance condition is not considered a factor in this discussion of fallacies.
To this it may be answered that 'noticeable frequency' is vague, and is perhaps best explained by the appearance condition.
However, the appearance condition, here expressed as fallacies having a semblance of correctness about them, remains in full force.
