false

Do nothing, returning a non-zero (false) exit status

Syntax
      false

`false' does nothing except return an exit status of 1, meaning "failure". It can be used as a place holder in shell scripts where an
unsuccessful command is needed.

`false' ignores all command line arguments, since to do otherwise would change expected behavior that some programmers may be relying on.

"False in one thing, false in everything" ~ Legal maxim

Related:

true - Do nothing, successfully.
yes - Print a string until interrupted.