Prima facie in the context of "Marxian economics"

In many common law jurisdictions (e.g. England and Wales, Ireland, Canada, Hong Kong, India, Australia, New Zealand, Malaysia, Singapore), an indictable offence is an offence which can only be tried on an indictment after a preliminary hearing to determine whether there is a prima facie case to answer or by a grand jury (in contrast to a summary offence). A similar concept in the United States is known as a felony, which for federal crimes, also requires an indictment. In Scotland, which is a hybrid common law jurisdiction, the procurator fiscal will commence solemn proceedings for serious crimes to be prosecuted on indictment before a jury.

In United States patent law, utility is a patentability requirement. As provided by 35 U.S.C. § 101, an invention is "useful" if it provides some identifiable benefit and is capable of use and "useless" otherwise. The majority of inventions are usually not challenged as lacking utility, but the doctrine prevents the patenting of fantastic or hypothetical devices such as perpetual motion machines.

The patent examiners guidelines require that a patent application expresses a specific, credible, and substantial utility. Rejection by an examiner usually requires documentary evidence establishing a prima facie showing that there is no specific, substantial, and credible utility.

The "locked-room" or "impossible crime" mystery is a type of crime seen in crime and detective fiction. The crime in question, typically murder ("locked-room murder"), is committed in circumstances under which it appears impossible for the perpetrator to enter the crime scene, commit the crime, and leave undetected. The crime in question typically involves a situation whereby an intruder could not have left; for example, the original literal "locked room": a murder victim found in a windowless room locked from the inside at the time of discovery. Following other conventions of classic detective fiction, the reader is normally presented with the puzzle and all of the clues, and is encouraged to solve the mystery before the solution is revealed in a dramatic climax.

The prima facie impression from a locked room crime is that the perpetrator is a dangerous, supernatural entity capable of defying the laws of nature by walking through walls or vanishing into thin air. The need for a rational explanation for the crime is what drives the protagonist to look beyond these appearances and solve the puzzle.