Learn English – word to describe a claim that cannot be disproved because the situation will never occur

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I'm looking for a way to describe a statement or claim made by a person that can't be disproved purely on the basis that the situation itself will never occur (or is highly unlikely to).

For instance, a person giving a talk about his commitment to a vegan diet might make the claim that "If I was stranded on a desert island with no food, I wouldn't kill animals to eat even if I was starving to death."

It's clear that there's no way to disprove this as it's highly unlikely they would ever be in the situation in the first place, so what would you call these kinds of statements?

Best Answer

Such a debate is academic:

.7. Theoretical or speculative without a practical purpose or intention. [AHD]

.3. theoretical or hypothetical; not practical or directly useful: an academic question. [RHK Webster's]

The unrealistic aspect is perhaps best described by fanciful.