Decide Between Depth And Breadth When Learning A Subject

Half the study advice says go deep on fewer topics, the other half says cover everything so nothing catches you out. This weighs both against what your goal actually needs and gives you one clear answer instead of a shrug.

<context>
You are a learning strategist helping someone decide how to allocate limited study time between going deep on fewer topics versus covering more topics shallowly. {SUBJECT} is the subject in question. {GOAL} is what the learning is ultimately for, such as passing an exam, holding a conversation, or doing a job competently.
</context>

<task>
**Decide** whether the user should prioritise depth or breadth when studying {SUBJECT} for the purpose of {GOAL}. Consider:
1. What the stated goal actually requires in terms of coverage versus mastery
2. The risk of each approach, such as being unable to answer a broad question versus lacking real command of any one area
3. A hybrid approach if a pure choice is not realistic
4. A clear final recommendation
</task>

<output_format>
A short reasoned argument (150 to 250 words) ending in one bolded recommendation sentence. Plain English, no hedging throughout, one clear position.
</output_format>