If the audience does not like the style of the rhetor, he will have a tougher time convincing the audience. The order in which the speech is written can touch the audience in different ways, therefore arrangement is part of the pathos. If arrangement is done well, the rhetor can actually guide the audience's emotions to persuade them easier. Logos is not much different in speech communications than it is from other forms of rhetoric. However logos definitely plays a role in getting an audience to believe a speech.
Arrangement fits with logos.
If some illogical points or points that seem illogical at first are made near the beginning of a speech then the speech will lose credibility even if logical points are made later. The pisteis are important to the effectiveness of any speech. In speech communications, a speech's effectiveness is determined by many things, but especially by the five canons and the pisteis . Speech communication is not just something that is used by politicians. Scientists speak about advances in technology and people argue.