Academic freedom is a moral and legal concept expressing the conviction that the freedom of inquiry by faculty members is essential to the mission of the academy as well as the principles of academia, and that scholars should have freedom to teach or communicate ideas or facts (including those that are inconvenient to external political groups or to authorities) without being targeted for repression, job loss, or imprisonment. While the core of academic freedom covers scholars acting in an academic capacity - as teachers or researchers expressing strictly scholarly viewpoints -, an expansive interpretation extends these occupational safeguards to scholars' speech on matters outside their professional expertise. It is a type of freedom of speech.