G77: Optional, Required and Only Do Different Jobs in a Manual

Read G77 learning instructions by separating optional actions, required steps and restricted permissions through a fictional practice-club manual.

A learner reads “you may watch the demonstration” and assumes the whole lesson can be skipped. Another reads “only reviewers may edit notes” and assumes every reviewer must edit something. Both interpretations stretch a small word beyond its job. For G77 readers navigating game manuals, we examine optional, required and restricted instructions. We use a fictional practice-club guide so the exercise stays focused on language rather than on guessing the design of a particular app.

The guide has three opening sentences: “Choose a lesson before continuing.” “You may watch the demonstration.” “Only reviewers may edit the shared explanation.” The first requires a step, the second permits a choice and the third limits who can perform an action. They do not form one scale from weak to strong. Each controls a different aspect of the process: whether a step is necessary, whether it is optional, and whose permission is relevant.

An optional action does not remove a required step

In our example, Anil selects a lesson and continues without watching the demonstration. He has met the required selection step and declined an optional action. Nothing in the three sentences makes the demonstration compulsory. By contrast, selecting no lesson and pressing Continue does not satisfy the first instruction merely because the demonstration was optional. A modifier attached to one action should not silently spread to neighbouring actions in the same paragraph.

Now the manual adds “You must read the lesson summary before submitting an answer.” The required action is reading the summary, and the timing condition is before submission. Watching the demonstration still does not substitute for it unless the guide explicitly says so. A reader can therefore decline the optional video yet need the required text. The visual prominence of the video does not change which action the sentence makes compulsory.

Optional can also be conditional. “You may save a draft after entering a lesson title” permits saving only after the stated condition. It does not promise that a blank draft can be saved. Nor does it require the reader to save every draft. Split the sentence into two questions: is saving compulsory, and what must be true if saving is chosen? The answers are no, and a lesson title must have been entered.

Only limits a permission; it does not command its use

The shared-explanation rule excludes non-reviewers from editing. It does not tell every reviewer to make an edit, or guarantee that no other condition applies. Suppose the next sentence says “Editing is available while the review period is open.” A reviewer then needs both the correct role and an open period. Being a reviewer satisfies one requirement, not every requirement. The word only establishes a restriction without supplying the entire procedure on its own.

For G77 learning discussions, it helps to attach the limiting phrase to its exact action. “Only reviewers may edit the shared explanation” does not say that only reviewers may read it. Reading and editing are different permissions. If the manual later allows participants to read the explanation after submitting an answer, that can coexist with the editing restriction. A reader should not turn a narrow limit on one action into a broad ban on everything around it.

Rewrite the ambiguous instruction

Try rewriting an unclear sentence: “Optional: read the hints and submit your answer.” Does optional apply to both actions, or only the hints? The wording is ambiguous. A clearer version is “You may read the hints. You must submit an answer to complete this lesson.” That separates the choices and the completion condition. In an actual guide, ask for clarification rather than choosing the interpretation that happens to make the task easiest or most restrictive.

Our practice-club sequence is now clear. A participant chooses a lesson, may watch its demonstration, reads the required summary and submits an answer. A reviewer may additionally edit the shared explanation during the open review period. Draft saving is available after a title is entered. These actions can coexist without contradiction because they apply to different choices, roles and stages. The reader no longer has to treat every sentence as either a universal command or an unrestricted permission.

The G77 teach-back is short: does optional mean irrelevant? No; it means the action can be declined under the stated conditions. Does must mean every neighbouring action is compulsory? No; identify the action it governs. Does only reviewers mean reviewers must act? No; it limits eligible actors. Keeping these three answers separate turns a dense manual into understandable instructions while preserving its actual boundaries instead of adding rules that the words never supplied.