The responsible use of caffeine

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Senior Member
The responsible use of caffeine can make us more alert and energetic, and it can improve our concentration and coordination.
The proper use ... watchful/nimble/vigilant ...

The second of the above is how I understand the first? Correct me if I am wrong. Thanks.
  • bibliolept

    Senior Member
    AE, Español
    Yes, "responsible" might be interpreted as proper, careful, judicious, measured, etc.
    I wouldn't say that alert is in this situation equivalent to watchful or vigilant and especially not to nimble. Alert can refer to more than being aware of our surroundings; it can also mean that we are more mentally agile, more mindful and focused.
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