A warped method of reasoning and debating technique encountered primarily in the pub, whereby common sense and prior knowledge are used at the expense of actual evidence. Resultant ideas, theories and conclusions range from the ridiculous to the surprisingly ingenious.
Tom: "Why is the music playing from the jukebox so crap?"
Dick: "I reckon they deliberately play crap songs, in order to make you pay to put on decent songs."
Harry: "That's a bit of pub logic!"
by Ant1234 November 8, 2012
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Named for computer science professor and all around cool guy, Dr. Daniel Spiegel, it is the principle in computer science education stating that if something is written, circled, underlined, or otherwise emphasized in the color red, then it is considered to be incorrect within the context of teaching at the time and may never be questioned, lest the questioner be unequivocally annihilated by said cool guy.
"Why is this wrong?" - Dr. Spiegel
"Because it is written in red." - Correct application of Spiegelian Logic, albeit vague
by Andy Breisch April 3, 2008
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This is the logic used by The Sydney, usually something that doesn't make sense to other people, but does to The Sydney, or logic used by The Sydney when she is tired or just doesn't care.

"I'll drive first, I thought about it during class, and I realized that I didn't care." ~A real life example of Sydney Logic
"I'll drive first, I thought about it during class, and I realized that I didn't care." ~A real life example of Sydney Logic
by The Legitness is real. May 12, 2016
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This is the logic used by The Sydney, usually something that doesn't make sense to other people, but does to The Sydney, or logic used by The Sydney when she is tired or just doesn't care.

"I'll drive first, I thought about it during class, and I realized that I didn't care." ~A real life example of Sydney Logic
"I'll drive first, I thought about it during class, and I realized that I didn't care." ~A real life example of Sydney Logic
by The Legitness is real. May 12, 2016
Get the Sydney Logic mug.
This is the logic used by The Sydney, usually something that doesn't make sense to other people, but does to The Sydney, or logic used by The Sydney when she is tired or just doesn't care.

"I'll drive first, I thought about it during class, and I realized that I didn't care." ~A real life example of Sydney Logic
"I'll drive first, I thought about it during class, and I realized that I didn't care." ~A real life example of Sydney Logic
by The Legitness is real. May 12, 2016
Get the Sydney Logic mug.
This is the logic used by The Sydney, usually something that doesn't make sense to other people, but does to The Sydney, or logic used by The Sydney when she is tired or just doesn't care.

"I'll drive first, I thought about it during class, and I realized that I didn't care." ~A real life example of Sydney Logic
"I'll drive first, I thought about it during class, and I realized that I didn't care." ~A real life example of Sydney Logic
by The Legitness is real. May 12, 2016
Get the Sydney Logic mug.
This is the logic used by The Sydney, usually something that doesn't make sense to other people, but does to The Sydney, or logic used by The Sydney when she is tired or just doesn't care.

"I'll drive first, I thought about it during class, and I realized that I didn't care." ~A real life example of Sydney Logic
"I'll drive first, I thought about it during class, and I realized that I didn't care." ~A real life example of Sydney Logic
by The Legitness is real. May 12, 2016
Get the Sydney Logic mug.