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If cryonics is at some point offered for free, what percentage of Americans will be signed up within 10 years?
Assume for the purpose of this question that before 2100, some organization or person offers cryonics for free, meaning that all fees and associated costs are waived. There are a few reasons why this might happen,
A wealthy person or organization begins offering it as a way of attracting people to cryonics.
The government subsidizes cryonics as an alternative to the expensive end-of-life care industry that currently exists. The world population is expected to be much older on average in the near future, which could put strain on governments to cut healthcare costs.
Cryonics proponents have historically given arguments for why they expect cryonics to scale extremely well, which if true, would imply that the cost of signing everyone in the United States up would be relatively cheap per capita.
After 10 years of when the offer was first made, what percentage of Americans will be signed up to receive cryonics? For reference, there are currently only about 1500 members signed up with Alcor, one of the largest cryonics organizations, which represents less than 0.00046% of the US population.
For the offering to count, there must be some sort of public message declaring the offer, and eligibility must be available to at least one hundred million people. The date of offering is the first date where a United States citizen receives a cryonics contract for free on behalf of an organization or person who is widely considered to be offering it as a gift to the general public (at least in the United States), rather than to some specific individuals. Here, a cryonics contract is defined as any legally binding commitment, by an organization plausibly capable of fulfilling it, to provide for cryopreservation of (at least) a person's brain provided that doing so is practically feasible.
If it is the case that the government provides the service as a routine procedure, and as such there is no literal contract to sign, the number of people said to be "signed up" in this case are the number of people the US Government promises to cryopreserve. As an example, if the US Government promised to preserve all United States citizens, then the proportion of citizens as a percentage of the total population of the United States (according to the latest Census projection) is the percentage of people in America "signed up for cryonics."
If cryonics is not offered for free to the general public by any organization or person before 2100, then this question resolves ambiguously.
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