When Jessica Watkin analyzed theatre as an undergraduate college student, there was a conspicuous absence of materials by playwrights who have diabilities in the curriculum.  Now a PhD prospect at the College of Toronto’s Centre for Drama, Theatre & Performance Scientific studies, Watkin showcases functions by Disabled artists in a new anthology she edited, Interdependent Magic: Disability General performance in Canada. (Watkin capitalizes “Disabled,” she clarifies in the book’s introduction, due to the fact it refers to a “political id and group of Incapacity… This is a alternative designed by every human being, and not a common ‘rule.’”) Designed largely for teachers and theatre practitioners, the book is made up of four plays and interviews by,…