Final answer:
Henry Wallace's speech faces limitations such as not sufficiently challenging conventional expectations and employing limited inclusive language, which might make it less engaging in the context of today's value for inclusivity and cultural reflexivity.
Step-by-step explanation:
One of the limitations of Henry Wallace's speech, "Achieving an Atmosphere of Mutual Trust and Confidence," is its lack of evidence in meeting or challenging conventional expectations in rhetorically effective ways. While Wallace's speech emphasizes sincerity and the importance of altruism over narcissism, it has been critiqued for not adequately challenging the listener or reader to question their cultural assumptions or to acknowledge the changing landscape of culture due to media and addiction. Moreover, this limitation might lead to it being perceived as less engaging, particularly in an era where inclusivity in language and addressing cultural ideas are increasingly valued. Another example of a speech that aimed to build public trust was Franklin D. Roosevelt's address to the nation, where he spoke plainly to engender confidence in his policy and plan, understanding the essential role that public cooperation played in the success of his national program. Similarly, the reference to the famous Kennedy-Nixon debate suggests that public perception can be strongly influenced by non-verbal cues, in this case, Nixon's sweat making him appear less trustworthy to the televised audience, despite his competence in debating the issues.