If you want to believe something, the most useful thing you can do is collect the best reasons not to.
This article argues against us in print: the strongest objections to cryonics, stated as fairly as we can manage, answered without spin.
Some are weak and dissolve once you state them precisely. A few are genuinely strong, and we will say which ones.
None amounts to a proof that cryonics fails, because no such proof exists. That is a lower bar than it sounds, and we are not claiming more than it.
The scientific objections
"Revival will never be possible"
This is usually said with more confidence than it has earned. Nobody can prove revival will work.
Nobody can prove it is impossible either, and impossibility is what this objection actually needs.
The claim rests on the structure-preservation bet: that you are the physical arrangement inside your brain, and that holding that arrangement still keeps the information recoverable.
Medicine has a poor record with confident impossibility claims. "We do not know how" is a different sentence from "it cannot be done".
We also say plainly that revival is not possible today and that nobody can give you a date.
"Even if revival works, today's method is the wrong one"
This is the better objection, and the one we take most seriously.
It is entirely possible that current vitrification preserves less than a future revival would need.
We accept that risk in the open. The bet is that good preservation now is good enough for a sufficiently capable future to work from.
It is a bet, not a certainty. The technical gaps are listed, including the ones nobody has closed.
The method has improved steadily since Basile Luyet vitrified living material in 1937, and it improves still. That is a reason for hope, not a guarantee.
If you find this objection persuasive, you have understood the field correctly. It is where our own research money goes.
"You will not be the real you"
The weak version says identity is an intangible essence that no procedure could hold. That version is easy to answer and not worth your time.
The strong version is about continuity. A perfect structural restoration might be a copy that believes it is you, while you simply ended.
That is a real philosophical problem, and we are not going to pretend it is settled. It is taken seriously here rather than waved away.
Two honest things can be said. The first is that the same puzzle already applies to dreamless sleep and to general anaesthesia, and we do not call those death.
The second is that this objection does not favour the alternative. Cremation does not preserve continuity. It ends the question along with the structure.
If continuity is what matters to you, the case for keeping the substrate rather than destroying it gets stronger, not weaker.
The practical objections
"It is too expensive, so it is only for the rich"
The sticker price is real. Whole-body cryopreservation at Tomorrow.bio is around 200,000 euros.
Almost nobody pays that as a lump sum. It is funded through life insurance, which turns a large number into a monthly premium.
That puts it inside the reach of ordinary earners, and the ultra-rich-only framing is examined in full elsewhere.
The usual obstacle is priority and belief rather than affordability. Where the money actually goes is itemised rather than asserted.
It is still a large sum, and weighing it is fair. We would rather you weighed it than assumed it was out of reach.
"The money should go to other science"
Over the short term this has force. Preservation is not the highest expected-value use of a research euro today.
Over a longer horizon it weakens. The funds are mostly private, and private money is not a fixed pool being diverted away from cancer research.
The underlying work also spills over. Cold-tissue medicine feeds organ transplantation and emergency care whether or not revival ever arrives.
A field can be worth funding for its byproducts alone.
"It is bad for the environment"
This one rests on a factual mistake: the belief that storage runs on electricity.
It does not. Patients rest in vacuum-insulated dewars kept cold by liquid nitrogen, which needs no power to hold its temperature.
It needs periodic topping up, and that is the whole ongoing energy cost. A power cut does not put a patient at risk.
The footprint is modest, and it shrinks further as nitrogen production moves to renewable electricity.
"The organization will not survive long enough"
This belongs on the list. An earlier version of this article called it one of the strong cautions and then never actually stated it.
It is strong, though the usual phrasing overstates it. Institutions can last: Kongo Gumi, a Japanese temple-building firm, ran for roughly 1,400 years before being absorbed in 2006.
What has not lasted is a cryonics organization. None has existed for anything close to three hundred years, and a patient may need to wait longer than that.
The answer is structural rather than reassuring. Long-term storage is deliberately separated from the operating business.
Care is funded from a patient care trust designed to pay for storage out of returns, not out of new sales.
We answer the blunt form of the question, what happens if Tomorrow.bio goes bankrupt, rather than treating it as unaskable.
None of that makes the risk zero. Of everything on this page, it is the objection we would probably rank highest ourselves.
"The future will not bother to revive you"
The common version imagines a hostile future. The stronger version is worse: an indifferent one.
Nobody has to wish you ill to leave you in a dewar. They only need other priorities and no particular reason to act.
Two things push back. Revival is not a favour done to a stranger, since patients arrive with records, families and often descendants.
And a future capable of revival at all would likely find it cheap, interesting, and defensible as a duty of care.
In a collapsed future it may not happen. Preservation then simply continues, and the question stays open rather than being closed.
The objection describes a delay in the bad case. It is not a disproof.
The ethical objections
These usually arrive as a set, and most turn out to be objections to life-extending medicine in general, applied selectively to this one case.
That does not make them empty. It means the first thing to test is whether they are applied consistently.
"It disrupts the natural order"
Almost everything in a hospital disrupts the natural order. Antibiotics, caesareans and dialysis all interrupt what would otherwise happen.
The question is not whether an intervention is natural but whether it is good, and that has to be argued case by case.
Where the objection is religious it deserves a real answer rather than a shrug, and it gets one.
"It is selfish"
Spending money on your own survival is not obviously selfish, or every medical treatment would be.
The sharper form is about the opportunity cost to your family, which is worth taking seriously and is worked through here.
Signing up is often the opposite of self-interested. Many members do it so their family is not left deciding under pressure.
"You could never adapt to the future"
This pictures someone waking alone in a strange century with nobody to explain any of it.
That is not the scenario. Reintegration is part of the undertaking, and waking up alone is a question we answer directly.
People already cross enormous cultural distance within one lifetime. Adaptation is hard, and it is not unprecedented.
That is the point of arguing against ourselves. A choice you have stress-tested against its best critics is one you can actually stand behind.
For the case that offering this at all is defensible, including where it would not be, our co-founder has argued it at length.
And if after all of it the lopsided logic of a small chance against none still holds, then the objections have done their job and so have you.
TL;DR: The strongest objections concern preservation damage, uncertain revival and long-term institutional risk. These problems are real, but they do not prove that preserving a chance is pointless.
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Work through the values and tradeoffs that shape your view of biostasis.
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Further reading