Zebrafish their larval stages. In 2011, the British Heart Foundation ran an advertising campaign publicising its intention to study the applicability of this ability to humans, stating that it aimed to raise £50 million in research funding. Zebrafish have also been found to regenerate photoreceptor cells and retinal neurons following injury, which has been shown to be mediated by the dedifferentiation and proliferation of Müller glia. Researchers frequently amputate the dorsal and ventral tail fins and analyze their regrowth to test for mutations. It has been found that histone demethylation occurs at the site of the amputation, switching the zebrafish's cells
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",