Think only of what the ˇsort if cases are in which we say that a game is played according to a particular rule.
The rule may be an aid to instructi[on|ng] ˇpeople in the game. The

pupil
person learning

is told the rule and is trained

to apply it.
in its application.

– Or it is an

implement
instrument

of the game itself. – Or:

a
ach

rule is used neither in instruction ˇteaching the game nor in the game itself; nor is it

included
laid down

in a book of rules. You learn the game by watching how others play ◇ it. But we say it is played according to such and such rules

rules,

for
because

a person watching ˇthe game

could
can

derive
read off

these rules from the practice of way the gameˇ is played, like a natural laws which the actions of the

players obey
game follow

. – But how does the observer distinguish, in this case, between a correct mistake on the part of the a players and a correct action in the game? There are signs characteristic signs for this in the behaviour of the players. Thi[s|n]k of the ch[r|a]racteristic behaviour of someone who has made a slip of the tongue corrects a slip of the tongue. It would be possible to

recognise
know that someone was doing

this [v|e]ven if we didn't understand his language.

(2015–) Wittgenstein Source Bergen Nachlass Edition (WS-BNE). Edited by the Wittgenstein Archives at the University of Bergen under the direction of Alois Pichler. In: Wittgenstein Source, curated by Alois Pichler (2009–) and Joseph Wang-Kathrein (2020–). (N) Bergen: WAB.