inhibit-read-only

inhibit-read-only is a variable defined in `C source code'.
Its value is

nil

Documentation:
Non-nil means disregard read-only status of buffers or characters.
If the value is t, disregard `buffer-read-only' and all `read-only'
text properties. If the value is a list, disregard `buffer-read-only'
and disregard a `read-only' text property if the property value
is a member of the list.