A delusion is a belief held with strong conviction despite superior evidence to the contrary. Unlike hallucinations, delusions are always pathological (the result of an illness or illness process). As a pathology, it is distinct from a belief based on false or incomplete information, dogma, poor memory, illusion, or other effects of perception.

Delusions typically occur in the context of neurological or mental illness, although they are not tied to any particular disease and have been found to occur in the context of many pathological states (both physical and mental). However, they are of particular diagnostic importance in psychotic disorders including schizophrenia, paraphrenia, manic episodes of bipolar disorder, and psychotic depression.

Although non-specific concepts of madness have been around for several thousand years, the psychiatrist and philosopher Karl Jaspers was the first to define the three main criteria for a belief to be considered delusional in his 1913 book General Psychopathology. These criteria are:

Aaron Dontez Yates (born November 8, 1971), better known by his stage name Tech N9ne (pronounced "Tech Nine"), is an American rapper from Kansas City, Missouri. In 1999, Yates and Travis O'Guin founded the record label Strange Music. Throughout his career, Yates has sold over one million albums and has had his music featured in film, television, and video games. In 2009, he won the Left Field Woodie award at the mtvU Woodie Awards.

His stage name originated from the TEC-9 semi-automatic handgun, given to him by rapper Black Walt due to his fast rhyming style. Yates later applied a deeper meaning to the name, claiming that it stands for the complete technique of rhyme, with 'tech' meaning technique and 'nine' representing the number of completion.

Aaron Dontez Yates was born on November 8, 1971 in Kansas City, Missouri. He began rapping at a very early age, and would rap the letters of his name in order to remember how to spell it. He never met his father, and his mother suffered from epilepsy and lupus when he was a child, which emotionally affected him and inspired him to "search for God." He would wander around abandoned buildings with his best friend, Brian Dennis, hoping to catch a ghost on film. In 2003, Dennis was shot and killed by his girlfriend's ex-boyfriend, which further inspired Yates' search for a higher power, as well as giving him the drive to vent his frustrations in his music.

Plus-size model is a term applied to a person who is engaged primarily in modeling plus-size clothing. Plus-size models also engaged in work that is not strictly related to selling large-sized clothing, e.g., stock photography and advertising photography for cosmetics, household and pharmaceutical products and sunglasses, footwear and watches. Therefore plus-size models do not exclusively wear garments marketed as plus-size clothing. This is especially true when participating in fashion editorials for mainstream fashion magazines.

Synonymous and interchangeable with plus-size model is "full-figured model," "extended-sizes model," and "outsize model".

Fashion designers are starting to look more closely at the earning potential from plus-size clothing, and have used plus-size models for their advertising campaigns and catwalks. Jean-Paul Gaultier and John Galliano both used plus-size models in their Spring 2006 showings in Paris. Gaultier also used plus-size models Marquita Pring and Crystal Renn in his Spring 2011 Ready to Wear show. Italian plus-size fashion house Elena Mirò now regularly stages biannual prêt-à-porter shows during Fashion Week in Milan. Mark Fast and William Tempest each used plus-size models during their own London Fashion Week showings for Spring 2009, and again as part of All Walks Beyond the Catwalk event held on September 19, 2009 in association with the British Fashion Council. Mark Fast also used plus-size models in Fall 2010, Fall 2011, and Spring 2012.