Going through a few thought experiments, one might think they could adapt by dusting it for prints and requiring you to use the one they found there. On the ot

Going through a few thought experiments, one might think they could adapt by dusting it for prints and requiring you to use the one they found there. On the other hand, one might habitually touch, but not register, random fingers to it, while registering some fairly unusual finger as the real one, while using the dominant hand's index finger to "unlock" it. Finally, someone might decide that if you fail the unlock, they'll just inspect the fingerprint module in isolation and if it works, they'll assume you did that deliberately.