Logos, ethos, and pathos

Barack Obama prefers using modes of persuasion like ethos and pathos in his 2012  victory speech. Nevertheless, there are a couple of instances of logos as well.

Modes of pe…

...

Logos

The speaker appeals to reason when he includes facts or uses a logical line of reasoning in his speech. Some relevant examples are:

By itself, the recognition that we have common hopes and dreams won't end all the gridlock, resolve all our problems or substitute for the painstaking work of building consensus and making the difficult compromises needed to move this country forward…

...

Ethos

Barack Obama appeals to trust or authority whenever he wants to make himself, the audience, or the people mentioned in his speech appear trustworthy, skilled, caring, or knowledgeable. For example, he describes Joe Biden as a competent, skilled politician: “I want to thank my friend and partner of the last four years, America's happy warrior, the best vice-president anybody could ever hope for, Joe Biden.” 

Also, Obama subtly reminds the audience of his achievements during his first term as US President, to construct legitimacy: “Our economy is recovering. A decad…