Evaluation of Example 1: U.S. Iran Discord

Passage

“The U.S. secretary of state has called for a ‘very strong message’ to be sent to Iran, after allegations of a plot to kill the Saudi ambassador to the US. … But Iranian officials condemned the allegations as a diversionary tactic[:] ‘ These are cheap claims. By giving it a wide media coverage, it was evident that they are trying to cover up their own problems.’”

“US to Pressure Iran Over ‘Plot to Kill Saudi Envoy’” BBC News 12 October 2011 http://www.bbc.co.uk/news/world-us-canada-15269348 (accessed 13 Oct. 2011).

Analsyis

Ad hominem tu quoque fallacy occurs. Rather than responding to the U.S. secretary's allegations, Iranian officials drop the issue and accuse the U.S. government of covering up their own problems.

U.S. secretary of state calls for rebuke of Iran.
Iranian officials state U.S. rebuke is a diversionary tactic.
U.S. rebuke is a cover-up.