Mutual knowledge in game theory is information known by all participatory agents.
 However, unlike common knowledge, a related topic, mutual knowledge does not require that all agents are aware that this knowledge is mutual.
 All common knowledge is mutual knowledge, but not all mutual knowledge is common knowledge.
 Mutual knowledge can arise accidentally, due to a failure to design the game properly, so all players independently discover this mutual knowledge, or deliberately, due to the expected course of the game.
Mutual liberty is an idea first coined by Alexis de Tocqueville in his 1835 work "Democracy in America".
 In effect, Tocqueville was referring to the general nature of American society during the 19th century.
 It appeared to him, at least on the surface, that every citizen in the United States had the opportunity to participate in the civic activities of the country.
 Another way to look at mutual liberty is by accounting for the collective free wills of every rational being in a community.
 Even though the notion of mutual liberty was introduced by Tocqueville, it was John Stuart Mill who greatly expanded it.
 Mill believed that the most proper occasion for mutual liberty was in a community governed by the consent of the governed, i.e., a republic.
 And according to Mill, it is only in a republic where members of all political factions can participate.
 It has been said that a republic is the form of government that divides people least.
 This statement pertains greatly to mutual liberty.
 Unlike positive and negative liberty, mutual liberty encompasses all citizens.
 It makes no distinction between political preference and social status.
 Mutual liberty pervades all sectors of society, from the homeless man on the street to the premier of the state.
 It is the process through which a general sense of morality gets exerted on the widest range of people in any given communal setting.
Ursinia is a genus of African plants in the chamomile tribe within the daisy family.
In economics, goods are materials that satisfy human wants and provide utility, for example, to a consumer making a purchase of a satisfying product.
 A common distinction is made between goods that are tangible property, and services, which are non-Physical.
 A good may be a consumable item that is useful to people but scarce in relation to its demand, so that human effort is required to obtain it.
 In contrast, free goods, such as air, are naturally in abundant supply and need no conscious effort to obtain them.
 Personal goods are things such as televisions, living room furniture, wallets, cellular telephones, almost anything owned or used on a daily basis that is not food related.
 Commercial goods are construed as any tangible product that is manufactured and then made available for supply to be used in an industry of commerce.
 Commercial goods could be tractors, commercial vehicles, mobile structures, airplanes and even roofing materials.
 Commercial and personal goods as categories are very broad and cover almost everything a person sees from the time they awake in their home, on their commute to work and arrival in the work place.
In contract law, a mistake is an erroneous belief, "at contracting", that certain facts are true.
 It can be argued as a defense, and if raised successfully can lead to the agreement in question being found void "ab initio" or voidable, or alternatively an equitable remedy may be provided by the courts.
 Common law has identified three different types of mistake in contract: the 'unilateral mistake', the 'mutual mistake' and the 'common mistake'.
 The distinction between the 'common mistake' and the 'mutual mistake' is important.
Arum maculatum is a common woodland plant species of the Araceae family.
 It is widespread across most of Europe, as well as Turkey and the Caucasus.
 It is known by an abundance of common names including snakeshead, adder's root, arum, wild arum, arum lily, lords-and-ladies, devils and angels, cows and bulls, cuckoo-pint, Adam and Eve, bobbins, naked girls, naked boys, starch-root, wake robin, friar's cowl, sonsie-give-us-your-hand, jack in the pulpit and cheese and toast.
 The name "lords-and-ladies" and other gender-related names refer to the plant's likeness to male and female genitalia symbolising copulation.
Puccinia sessilis is a fungal plant pathogen, also known as Arum Rust or Ransons Rust.
 It commonly infects "Arum maculatum" and "Allium ursinum" causing yellow to orange circular patches on leaves.
 On the underside it produces raised orange aecia commonly covered in spores.
 It is common in Eurasia in the Spring.
Mutual knowledge is a fundamental concept about information in game theory, (epistemic) logic, and epistemology.
 An event is mutual knowledge if all agents know that the event occurred.
 However, mutual knowledge by itself implies nothing about what agents know about other agents' knowledge: i.e. it is possible that an event is mutual knowledge but that each agent is unaware that the other agents know it has occurred.
 Common knowledge is a related but stronger notion; any event that is common knowledge is also mutual knowledge.
Dracunculus vulgaris is a species of aroid in the genus "Dracunculus" and is known variously as the common dracunculus, dragon arum, the black arum, the voodoo lily, the snake lily, the stink lily, the black dragon, the black lily, dragonwort, and ragons.
 In Greece, part of its native range, the plant is called drakondia, the long spadix being viewed as a small dragon hiding in the spathe.
Arum is a genus of flowering plants in the family Araceae, native to Europe, northern Africa, and western and central Asia, with the highest species diversity in the Mediterranean region.
 Frequently called "arum lilies", they are not closely related to the true lilies "Lilium".
 Plants in closely related "Zantedeschia" are also called "arum lilies".

Question: Arum and Ursinia, have which mutual common distinction?
Answer: plants