Date of Birth: 
About J. Anthony Blair
- John Anthony Blair (born 12 August 1941) is a Canadian philosopher, born in Ottawa, Ontario.
- Along with his colleague Ralph Johnson, he has been credited as one of the founding members of the informal logic movement in North America.
- The two co-published one of the movement's most influential texts, "Logical Self-Defense".
- Blair is also co-founder of the Centre for Research in Reasoning, Argumentation, and Rhetoric, co-founder of the Ontario Society for the Study of Argumentation (OSSA), and a founding board member of the International Society for the Study of Argumentation (ISSA).
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