Arguments ad hominem, faulty cause-and-effect arguments, non sequiturs, and faulty

How does a listener apply critical thinking to the speech situation? What should a speaker do to

satisfy the critical listener? What will be an ideal response?

A bridge collapsed last week causing many fatalities, and now the police, first responders, and civil engineers call a press conference to provide results of their investigation. This is a time when

a. a group does not need to create an agreed-on agenda. b. one individual acts as a mentor for the others in the group. a. a violation of time limits would severely damage the group's presentation. b. both a brief oral report and a more extensive written report are required of the group.