Parallel Logic is an experimental electronic logic architecture which uses a single electromechanical parametric resonator into which multiple channels of binary information are encoded as mechanical oscillations at different frequencies. 
Or, according to Ophelia Benson, parallel logic is... well, we're not entirely sure exactly. This page attempts to document the possible meanings of the term in Ophelia-speak.
- A weasel term used to avoid responsibility for making an unsavoury claim. (I'm not racist, but...)
- Two contradictory logical statements which are espoused in parallel, ostensibly in support of a single argument.
The supposed parallel logical statements are italicised.
Person A: TAM is doing to women what the Nazis did to Jews. That's not to compare TAM to Nazi Germany.
Person B: Nonsense - that is exactly what you did. You compared TAM to Nazi Germany.
Person A: I did not. It's matter of parallel logic. Quit being so mean to me.
Example applied to "Freethought"
- 'August 11, 2012 at 3:49 pm Ophelia Benson: Ok this is a good one. From a comment on Jen’s post on blunderfoot.
- “Freethought” means you use reason and logic to come to a conclusion, and not believing everything anyone says — even a close friend — at face value.
- Hahahahahahahahaha yes right that’s what freethought means. A close friend tells you she has a headache and you interrogate her for an hour trying to get her to demonstrate that fact beyond a reasonable doubt.