I believe to get the behavior you need a brainless frog - they are shockingly functional due to how much behavior is in bodily reflexes. In that context the brainless frog sort of fits as a metaphor of "cargo culted" or tradition fixed behavior or single strategy. An approach well adapted enough to the expected environment that no thinking is required but is doomed as soon as it has to deal with change.
sorry to be pedantic, but if you believe wikipedia, it is true (just you probably cant reproduce it on your kitchen stove)
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The New Psychology (1897): "a live frog can actually be boiled without a movement if the water is heated slowly enough; in one experiment the temperature was raised at a rate of 0.002°C per second, and the frog was found dead at the end of 2½ hours without having moved."
It's just a metaphor. It's not a law of nature, nor is it even a GOOD metaphor.