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"Accidentally"? Implying she should've lied about it even though they probably have some reason (evaluating risk presumably) for asking?

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Let's say a year ago, you walked across a bridge in Mexico for five minutes to see if it's true that Mexico has a yellowish haze like in the movies. Oh, it doesn't. Then you walked back to Texas.

A year later, you go to a blood donation center and they ask you: "Did you go to Mexico in the last N years?"

If you say "Yes", you are banned for four years. If you say "No", you donate liters of blood over the next four years.

If you were in this exact situation, how would you weight which answer is better?

I understand where you're coming from. But on the off chance something unrelated were to go wrong with the blood down the line, it could be shown that a false answer was knowingly given. You have to weigh this risk against keeping "the privilege to give blood". I guess it depends on your values and risk tolerance.

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