Laughter is not an essential component of satire; in fact there are types of satire that are not meant to be funny at all. Conversely, not all humour, even on such topics as politics, religion or art is necessarily satirical, even when it uses the satirical tools of irony, parody, and burlesque.
(help, talk, get involved!) (July 2014). High-functioning autism (HFA) is a term applied to people with autism who are deemed to be cognitively higher functioning (with an IQ of greater than 70) than other people with autism.
Hydrofluoric acid (HF) is a solution of hydrogen fluoride in water. Its chemical formula is HF. It is a weak acid, but very corrosive and extremely toxic. It can dissolve glass to make hexafluorosilicic acid. If it gets on the skin, it can kill you. It is made by reacting fluorite with sulfuric acid.