And, if you intend to deceive, there are many examples of solid looking written ...

		dagss 9 months ago \| parent \| context \| favorite \| on: A visual proof that a^2 – b^2 = (a + b)(a – b) And, if you intend to deceive, there are many examples of solid looking written algebraic proofs that 1 = 2. That doesn't disqualify written proofs...