If a speaker makes fallacious reasoning in his/her argument, it does not indicate that the argument is weak in pathos. The idea of employing pathos in one's speech, writing, or argument is to make the listeners and readers emotional and pitiful.
In fact, fallacious reasoning indicates a speaker's argument is weak in logos and not pathos. The use of logos in an argument evokes the sense of logic and reasoning in the listeners' minds. Therefore, if one makes a fallacious reasoning in his/her argument, he argument is weak in logos.
