Mutualism or interspecies reciprocal altruism is a relationship between individuals of different species where both individuals benefit. In general, only lifelong interactions involving close physical and biochemical contact can properly be considered symbiotic. Mutualistic relationships may be either obligate for both species, obligate for one but facultative for the other, or facultative for both. Many biologists restrict the definition of symbiosis to close mutualist relationships.
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): What must interspecies reciprocal altruism be considered to fit the the definition of symbiosis?
Ah, so.. unanswerable

Due to insistence by the International Federation of Association Football (FIFA), the international governing body of football, that domestic leagues reduce the number of games clubs played, the number of clubs was reduced to 20 in 1995 when four teams were relegated from the league and only two teams promoted. On 8 June 2006, FIFA requested that all major European leagues, including Italy's Serie A and Spain's La Liga be reduced to 18 teams by the start of the 200708 season. The Premier League responded by announcing their intention to resist such a reduction. Ultimately, the 200708 season kicked off again with 20 teams.
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): On which date did FIFA request that all European leagues reduce the number of teams within themselves to 18?
Ah, so.. 8 June 2006

The Constitution provides that "a regular Statement and Account of the Receipts and Expenditures of all public Money shall be published from time to time". That provision of the Constitution is made specific by Section 331 of Title 31 of the United States Code. The sums of money reported in the "Statements" are currently being expressed in U.S. dollars (for example, see the 2009 Financial Report of the United States Government). The U.S. dollar may therefore be described as the unit of account of the United States.
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): What is the unit of account of the United States?
Ah, so..
U.S. dollar