Jos De Roo

EYE socket: where the light bulb meets the electricity

arrows

• queries use an upwards double arrow =^
• backward rules use a leftwards double arrow <=
• forward rules use a rightwards double arrow =>

variables

• only _:x blank nodes in triples and quads
• only ?x quickvars in rules and queries
• quantified var:x variables in proofs

triptych

        eye                     observership
         u                       /        \
        =^                      /          \
   l <= eye => r            origin ------ evolution

Euler lost both eyes        Hawking-Hertog triptych