diff --git a/3sat.py b/3sat.py
index 2d03d1b..8f49a14 100644
--- a/3sat.py
+++ b/3sat.py
@@ -1,6 +1,7 @@
 import inspect
 import itertools
 import random
+from pprint import pprint
 
 from grover import classical_func_search
 
@@ -31,7 +32,7 @@ class SAT(object):
     def and_(self, and_clauses):
         def inner_and_(params):
             for and_clause in and_clauses:
-                if and_clause(params):
+                if not and_clause(params):
                     return False
             return True
 
@@ -63,7 +64,7 @@ class SAT(object):
         self.inner = inner_generate
 
     def __call__(self, args):
-        self.inner(args)
+        return self.inner(args)
 
     def show(self):
         for j, _or_clause in enumerate(self.and_clauses):
@@ -91,10 +92,10 @@ def classical_3sat(func):
 
 
 def main():
-    gen_3sat = SAT(predicates=6)
+    gen_3sat = SAT(predicates=4)
     gen_3sat.generate(ands=1)
     gen_3sat.show()
-    print(classical_3sat(gen_3sat))
+    pprint(classical_3sat(gen_3sat))
 
 
 if __name__ == "__main__":
diff --git a/grover.py b/grover.py
index b8c7ed4..01401ae 100644
--- a/grover.py
+++ b/grover.py
@@ -1,5 +1,4 @@
 # http://twistedoakstudios.com/blog/Post2644_grovers-quantum-search-algorithm
-import inspect
 import itertools
 import random
 from pprint import pprint
@@ -18,9 +17,10 @@ def classical_func_search(func, input_range):
     return rv
 
 
-def _3sat(x1, x2, x3):
+def _3sat(params):
     # https://cstheory.stackexchange.com/questions/38538/oracle-construction-for-grovers-algorithm
     # 3-SAT from here: https://qiskit.org/textbook/ch-applications/satisfiability-grover.html
+    x1, x2, x3 = params
     return (not x1 or not x2 or not x3) and \
            (x1 or not x2 or x3) and \
            (x1 or x2 or not x3) and \
@@ -30,9 +30,7 @@ def _3sat(x1, x2, x3):
 
 def classical_3sat(func):
     # Generate all possible true/false tupples for the 3-sat problem
-    sig = inspect.signature(func)
-    params = sig.parameters
-    input_range = list(itertools.product([True, False], repeat=len(params)))
+    input_range = list(itertools.product([True, False], repeat=3))
     random.shuffle(input_range)
     return classical_func_search(func, input_range)