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+title = "Second possible solution: Craig interpolation"
+author = "Yann Herklotz"
+tags = []
+categories = []
+backlinks = ["3a8g5h1"]
+forwardlinks = ["4e1", "3a8g5h3"]
+zettelid = "3a8g5h2"
++++
+
+The second possible solution could be to use Craig interpolation
+([\#4e1]), which was a suggestion by John. This is close to what we
+currently already do, however a bit more sound (replacing positive
+literals by T and replacing negative literals by $\perp$). This does not
+seem to completely solve the problem, because it only really works for
+implication, and for the independence property that's not enough.
+
+ [\#4e1]: /zettel/4e1