diff --git a/interp/tools.py b/interp/tools.py
index 44cd32a..45dd032 100644
--- a/interp/tools.py
+++ b/interp/tools.py
@@ -18,10 +18,19 @@ def rms(errors):
 
 def exact_func(X):
   """
-    the exact function used from baker's article (for testing)
+    the exact function (2D) used from baker's article (for testing)
   """
   x ,y = X
-  answer = 1.0 + x*x + y*y # np.power((np.sin(x * np.pi) * np.cos(y * np.pi)), 2)
+  answer = np.power((np.sin(x * np.pi) * np.cos(y * np.pi)), 2)
+  log.debug(answer)
+  return answer
+
+def exact2D(X):
+  """
+    A friendlier 2D func
+  """
+  x ,y = X
+  answer = 1.0 + x*x + y*y
   log.debug(answer)
   return answer
 
@@ -43,6 +52,7 @@ def exact(X):
 def improved_answer(answer, exact, verbose=False):
   if not answer['error']:
     return True
+
   log.debug('qlin:  %s' % answer['qlin'])
   log.debug('error: %s' % answer['error'])
   log.debug('final: %s' % answer['final'])