Law School

In jurisprudence, duress or coercion refers to a situation whereby a person performs an act as a result of violence, threat, or other pressure against the person. Black's Law Dictionary (6th ed.) defines duress as "any unlawful threat or coercion used... to induce another to act  in a manner  otherwise would not ". Duress is pressure exerted upon a person to coerce that person to perform...

The discovery doctrine, also called doctrine of discovery, is a concept of public international law expounded by the United States Supreme Court in a series of decisions, most notably Johnson v M'Intosh in 1823. Chief Justice John Marshall explained and applied the way that colonial powers laid claim to lands belonging to foreign sovereign nations during the Age of Discovery. Under it, title to la...

The public domain consists of all the creative work to which no exclusive intellectual property rights apply. Those rights may have expired, been forfeited, expressly waived, or may be inapplicable. As examples, the works of William Shakespeare, Ludwig van Beethoven, and Georges Méliès, are in the public domain either by virtue of their having been created before copyright existed, or by their cop...

In the law of torts, malpractice, also known as professional negligence, is an "instance of negligence or incompetence on the part of a professional". Professionals who may become the subject of malpractice actions include:  medical professionals: a medical malpractice claim may be brought against a doctor or other healthcare provider who fails to exercise the degree of care and skill that a...

Murder is the unlawful killing of another human without justification or valid excuse, especially the unlawful killing of another human with malice aforethought. This state of mind may, depending upon the jurisdiction, distinguish murder from other forms of unlawful homicide, such as manslaughter. Manslaughter is killing committed in the absence of malice, brought about by reasonable provocation,...

The capacity of natural and juridical persons (legal persons), in general, determines whether they may make binding amendments to their rights, duties, and obligations, such as getting married or merging, entering into contracts, making gifts, or writing a valid will. Capacity is an aspect of status, and both are defined by a person's personal law: for natural persons, the law of domicile or lex d...

Hostile possession. The disseisor must have entered or used the land without permission from the true owner. The disseisor's motivations may be interpreted by the court in several ways, depending upon state law and precedent: Objective view – the land was used without true owner's permission and in a manner inconsistent with true owner's rights. Bad faith or intentional trespass view – the land wa...

Fair use in particular areas. Computer code. The Oracle America, Inc. v Google, Inc. case revolves around the use of application programming interfaces (APIs) used to define functionality of the Java programming language, created by Sun Microsystems and now owned by Oracle Corporation. Google used the APIs' definition and their structure, sequence and organization (SSO) in creating the Android ope...

The tort of negligent infliction of emotional distress (NIED) is a controversial cause of action, which is available in nearly all U.S. states but is severely constrained and limited in the majority of them. The underlying concept is that one has a legal duty to use reasonable care to avoid causing emotional distress to another individual. If one fails in this duty and unreasonably causes emotiona...

Manslaughter is a common law legal term for homicide considered by law as less culpable than murder. The distinction between murder and manslaughter is sometimes said to have first been made by the ancient Athenian lawmaker Draco in the 7th century BC. The definition of manslaughter differs among legal jurisdictions. Voluntary manslaughter. In voluntary manslaughter, the offender had intent to kil...

An implied-in-fact contract is a form of an implied contract formed by non-verbal conduct, rather than by explicit words. The United States Supreme Court has defined it as "an agreement 'implied in fact” as "founded upon a meeting of minds, which, although not embodied in an express contract, is inferred, as a fact, from conduct of the parties showing, in the light of the surrounding circumstances...

Adverse possession, sometimes colloquially described as "squatter's rights", is a legal principle under which a person who does not have legal title to a piece of property — usually land (real property) — acquires legal ownership based on continuous possession or occupation of the property without the permission of its legal owner. In general, a property owner has the right to recover possession o...

Fair use is a doctrine in the law of the United States that permits limited use of copyrighted material without having to first acquire permission from the copyright holder. Fair use is one of the limitations to copyright intended to balance the interests of copyright holders with the public interest in the wider distribution and use of creative works by allowing as a defense to copyright infringe...

Regulations by country. In some countries, there exists a legal requirement for citizens to assist people in distress, unless doing so would put themselves or others in harm's way. Citizens are often required to, at minimum, call the local emergency number, unless doing so would be harmful, in which case the authorities should be contacted when the harmful situation has been removed. As of 2012, t...

A duty to rescue is a concept in tort law that arises in a number of cases, describing a circumstance in which a party can be held liable for failing to come to the rescue of another party who could face potential injury or death without being rescued. In common law systems, it is rarely formalized in statutes which would bring the penalty of law down upon those who fail to rescue. This does not n...

In the USA, the rescue doctrine of the law of torts holds that if a tortfeasor creates a circumstance that places the tort victim in danger, the tortfeasor is liable not only for the harm caused to the victim, but also the harm caused to any person injured in an effort to rescue that victim. This doctrine was originally promulgated by Benjamin N. Cardozo in the 1921 case, Wagner v Int'l Ry. Co. Th...

A hot prowl burglary, cat burglary, or home invasion is a sub-type of burglary (or in some jurisdictions, a separately defined crime) in which an offender unlawfully breaks and enters into a building or residence while the occupants are inside. The overarching intent of a hot prowl burglary can be theft, robbery, assault, sexual assault, murder, kidnapping, or another crime, either by stealth or d...

Homicide is the act of one human killing another. A homicide requires only a volitional act by another person that results in death, and thus a homicide may result from accidental, reckless, or negligent acts even if there is no intent to cause harm. Homicides can be divided into many overlapping legal categories, including murder, manslaughter, justifiable homicide, killing in war (either followi...

A firm offer is an offer that will remain open for a certain period or until a certain time or occurrence of a certain event, during which it is incapable of being revoked. As a general rule, all offers are revocable at any time prior to acceptance, even those offers that purport to be irrevocable on their face. In the United States, an exception is the merchant firm offer rule set out in Uniform...

Consideration is a concept of English common law and is a necessity for simple contracts but not for special contracts (contracts by deed). The concept has been adopted by other common law jurisdictions. The court in Currie v Misa  declared consideration to be a “Right, Interest, Profit, Benefit, or Forbearance, Detriment, Loss, Responsibility”. Thus, consideration is a promise of something o...

Personal property is property that is movable. In common law systems, personal property may also be called chattels or personalty. In civil law systems, personal property is often called movable property or movables – any property that can be moved from one location to another. Personal property can be understood in comparison to real estate, immovable property or real property (such as land and b...

Usage. A trademark identifies the brand owner of a particular product or service. Trademarks can be used by others under licensing agreements; for example, Bullyland obtained a license to produce Smurf figurines; the Lego Group purchased a license from Lucasfilm in order to be allowed to launch Lego Star Wars; TT Toys Toys is a manufacturer of licensed ride-on replica cars for children. The unauth...

A trademark is a type of intellectual property consisting of a recognizable sign, design, or expression which identifies products or services of a particular source from those of others, although trademarks used to identify services are usually called service marks. The trademark owner can be an individual, business organization, or any legal entity. A trademark may be located on a package, a labe...

Res ipsa loquitur (Latin: "the thing speaks for itself") is a doctrine in the Anglo-American common law that says in a tort lawsuit a court can infer negligence from the very nature of an accident or injury in the absence of direct evidence on how any defendant behaved. Although modern formulations differ by jurisdiction, common law originally stated that the accident must satisfy the necessary el...

Harassment covers a wide range of behaviors of an offensive nature. It is commonly understood as behavior that demeans, humiliates, or embarrasses a person, and it is characteristically identified by its unlikelihood in terms of social and moral reasonableness. In the legal sense, these are behaviors that appear to be disturbing, upsetting, or threatening. They evolve from discriminatory grounds,...