Symbolic logic

From RationalWiki
Jump to: navigation, search
Part of the series on

Logic and rhetoric

Icon logic.svg
Key articles
General logic
Bad logic

Symbolic logic is a logical technique that allows reduction of a logical argument stated in natural language to mathematical logic. This helps to avoid issues of semantics that plague many logical debates. A proof in symbolic logic is only as true as its premises.


Let A be defined as "Water has memory of chemicals dissolved in it"
Let B be defined as "Nearly every chemical has been dissolved in the oceans at some point"
Let C be defined as "The oceans have memory of nearly every chemical"
Let D be defined as "The oceans are as effective a homeopathic treatment as anything you could buy."
1: A
2: B
3: A&B→C
4: C→D
Line a: By 1, 2, and 3: C
Line b: By 4 and a:D