June 15, 2013 at 04:55PM [via Facebook]
Groundbreaking developments in the history of mathematics and logic: in 1931 Kurt Gödel published “Ãœber formal unentscheidbare Sätze der Principia Mathematica und verwandter Systeme I.” The paper is famous among logicians and mathematicians for the two “Incompleteness Theorems” it contains, but is famous among almost everyone else for containing a multi-page Rorschach inkblot, allowing a projection test in which the reader-subject can discern a dismissive response to whichever deductive argument they happen to like the least, or, if they prefer, to the exercise of deductive logic as a whole.
- —Rad Geek