Final answer:
The statement is false; to indent a new paragraph, you either press the Tab key once or space over five times, but not both. Different styles and guidelines exist for formatting paragraphs in various contexts.
Step-by-step explanation:
The statement about paragraph indentation is false. The conventional way to indent for a new paragraph is to either press the Tab key once (which is typically equivalent to five or seven spaces depending on the word processor's settings) or space over five times if you are manually creating the indentation without a tab key. It is not necessary to both tab once and space over five times; you would choose one method or the other.
However, it is worth noting that in typesetting and word processing, there are different styles and guidelines for paragraphs. In some formats, such as HTML coding or certain academic styles, paragraphs do not always require an indentation, whereas in others, such as novel manuscripts, indentation is standard. In academic writing, formats like MLA and APA have specific indentation rules. Additionally, for hanging indents, which are used in bibliographies and reference lists, the first line starts at the left margin and subsequent lines are indented.