Final answer:
A formal business letter should include a professional tone, a central purpose, and specific formatting while excluding arguments of why the reader is wrong.
Explanation:
A formal business letter should contain all of the following except a strong argument of why the reader is wrong:
- A professional and respectful tone: Maintaining a respectful tone in a business letter is crucial to establish credibility and professionalism.
- A central purpose or claim: Every business letter should have a clear main point to convey the intended message effectively.
- Specific formatting: Proper formatting, such as block format, helps organize the content and present a polished appearance.
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