Dracula fish Dracula fish The dracula fish ("Danionella dracula") is a species of tropical danionin fish from the cyprinid family. It is a freshwater fish endemic to Myanmar. A close relative is "Brachydanio rerio", the zebrafish of aquariums. It is named dracula after its unusual "fangs"; male dracula fish have protruding tooth-like bones stemming from their jawbones. Males have been observed using their fangs to spar with other males. Identified in April 2007 from specimens shipped to the United Kingdom in a consignment of aquarium fishes, the dracula fish has so far only been found in the wild in a small stream
Fallacy of four terms the line between formal and informal (material) fallacies, however it is usually considered an informal fallacy because the argument's form appears valid. Fallacy of four terms The fallacy of four terms () is the formal fallacy that occurs when a syllogism has four (or more) terms rather than the requisite three. This form of argument is thus invalid. Categorical syllogisms always have three terms: Here, the three terms are: "goldfish", "fish", and "fins". Using four terms invalidates the syllogism: The premises do not connect "humans" with "fins", so the reasoning is invalid. Notice that there are four terms: "fish", "fins",