diff --git a/notebooks/Tutorial.ipynb b/notebooks/Tutorial.ipynb
index c226c83..f53c99f 100644
--- a/notebooks/Tutorial.ipynb
+++ b/notebooks/Tutorial.ipynb
@@ -882,59 +882,6 @@
     "could also have written:"
    ]
   },
-  {
-   "cell_type": "code",
-   "execution_count": 40,
-   "id": "ddebf717-0ad4-4241-9f44-703a39c8386d",
-   "metadata": {},
-   "outputs": [],
-   "source": [
-    "from collections.abc import Sequence\n",
-    "from inspect import getmro"
-   ]
-  },
-  {
-   "cell_type": "code",
-   "execution_count": 37,
-   "id": "c04669ae-a3bd-4c5e-be63-8ac5019ed0af",
-   "metadata": {},
-   "outputs": [
-    {
-     "data": {
-      "text/plain": [
-       "True"
-      ]
-     },
-     "execution_count": 37,
-     "metadata": {},
-     "output_type": "execute_result"
-    }
-   ],
-   "source": [
-    "isinstance(stimuli, Sequence)"
-   ]
-  },
-  {
-   "cell_type": "code",
-   "execution_count": 38,
-   "id": "b8452efb-b7c7-4f83-85a5-96fa7931f846",
-   "metadata": {},
-   "outputs": [
-    {
-     "data": {
-      "text/plain": [
-       "False"
-      ]
-     },
-     "execution_count": 38,
-     "metadata": {},
-     "output_type": "execute_result"
-    }
-   ],
-   "source": [
-    "isinstance(np.arange(100), Sequence)"
-   ]
-  },
   {
    "cell_type": "code",
    "execution_count": 23,