diff --git a/README.txt b/README.txt
index 2121395..a83d9b1 100644
--- a/README.txt
+++ b/README.txt
@@ -16,6 +16,7 @@ TODOs: (that i can remember right now)
 - compute how many input neurons the network needs instead of hardcoding
 - add some detection for enemies later in the game
 - fix cfg.enable_overlay (smb.lua doesn't see it being changed)
+- maybe log the average distance from init?
 
 naive:
 - learn any combination of buttons, starting from title screen
diff --git a/main.lua b/main.lua
index c328804..1bcef18 100644
--- a/main.lua
+++ b/main.lua
@@ -112,8 +112,8 @@ local log_map = {
     delta_mean = 4,
     delta_std = 5,
     step_std = 6,
-    weight_mean = 7,
-    weight_std = 8,
+    weight_mean = 7, -- TODO: rename to param_mean.
+    weight_std = 8, -- TODO: rename to param_std.
     test_trial = 9,
     decisions = 10,
 }
diff --git a/snes.lua b/snes.lua
index 282264a..7110b62 100644
--- a/snes.lua
+++ b/snes.lua
@@ -146,7 +146,6 @@ function Snes:ask_mix(start_anew)
     local marked = {}
     for p=1, min(#self.old_asked, self.popsize) do
         local a = self.old_asked[p]
-        local n = self.old_noise[p]
 
         -- TODO: cache probs?
         local prob_new = 0