Ask yourself if the cost of having to look it up at a potentially inconvenient time (e.g. in the middle of a busy work day) is greater than the cost of memorizi

Ask yourself if the cost of having to look it up at a potentially inconvenient time (e.g. in the middle of a busy work day) is greater than the cost of memorizing it during scheduled less busy times (e.g. doing flashcards while eating dinner or during a bus commute).