From 19e009ac1e974c6e14a647f9fefba26dc5997a02 Mon Sep 17 00:00:00 2001
From: "Brandon T. Willard" <brandonwillard@users.noreply.github.com>
Date: Wed, 12 May 2021 21:52:00 -0500
Subject: [PATCH] Fix bad boolean condition

---
 kanren/facts.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kanren/facts.py b/kanren/facts.py
index c0b693e..5fd3ba4 100644
--- a/kanren/facts.py
+++ b/kanren/facts.py
@@ -67,7 +67,7 @@ def goal(substitution):
 
             for fact in facts:
                 unified = unify(fact, args2, substitution)
-                if unified != False:
+                if unified is not False:
                     yield merge(unified, substitution)
 
         return goal