Student or Learner
I've seen a few examples where the definite article is used for describing a class
The lion is a fierce and dangerous animal.
The human heart is composed of three layers.
These sentences are simple enough to understand, but can they be used where using the indefinite article is sufficient? such as
"Students are not allowed to use the calculator"
Does it need to be "calculators" ?
or when telling somebody to do something like
"Please use the pen instead of the pencil"
Assuming we are not talking about a specific pen or pencil
Thanks that's really helpful