diff --git a/interp/tools.py b/interp/tools.py
index 45dd032..f0b354f 100644
--- a/interp/tools.py
+++ b/interp/tools.py
@@ -16,7 +16,7 @@ def rms(errors):
   r = np.sqrt(r / len(errors))
   return r
 
-def exact_func(X):
+def baker_exact_2D(X):
   """
     the exact function (2D) used from baker's article (for testing)
   """
@@ -25,7 +25,7 @@ def exact_func(X):
   log.debug(answer)
   return answer
 
-def exact2D(X):
+def friendly_exact_2D(X):
   """
     A friendlier 2D func
   """
@@ -34,7 +34,7 @@ def exact2D(X):
   log.debug(answer)
   return answer
 
-def exact_func_3D(X):
+def baker_exact_3D(X):
   """
     the exact function (3D) used from baker's article (for testing)
   """
@@ -45,7 +45,7 @@ def exact_func_3D(X):
   log.debug(answer)
   return answer
 
-def exact(X):
+def friendly_exact_3D(X):
   x,y,z = X
   return 1 + x*x + y*y + z*z