Formal business language refers to a style of communication that is used in professional or business contexts, which is generally more structured and formal than casual or informal language. This style of communication typically adheres to certain conventions and standards, such as using proper grammar, spelling, and punctuation, avoiding contractions, and using formal titles and honorifics when appropriate.

However, formal business language is not the same as formal logic, which is a branch of mathematics that deals with the study of deductive reasoning and the formalization of language and thought. While formal business language may have some elements of formal logic in terms of clear and structured communication, it is primarily concerned with achieving clarity and professionalism in business communication rather than strictly adhering to the rules of formal logic.