If you want to believe something, the most useful thing you can do is collect the best reasons not to. This article is our attempt to argue against ourselves in print: the strongest objections to cryonics, stated as fairly as we can manage, with honest answers rather than dismissals. Some of these objections are weak. A few are genuinely strong and we will say so. What none of them amount to is a proof that cryonics cannot work, because no such proof exists.
The scientific objections
"Revival will never be possible"
This is usually stated with more confidence than it deserves. Nobody can prove revival will work, but nobody can prove it is impossible either, and the latter is what this objection needs. The claim rests on the structure-preservation bet: that what makes you yourself is the physical arrangement described in memory, identity and the brain, and that holding that structure intact keeps the information recoverable. The history of medicine is unkind to confident impossibility claims. CPR, organ transplants, and antibiotics were all once "obviously" out of reach. "We do not know how yet" is not the same statement as "it cannot be done."
"Even if revival works, today's method is the wrong one"
This is a much better objection, and an honest one. It is entirely possible that current vitrification preserves less than future revival would need. We accept that risk openly. Vitrification is itself the product of decades of refinement, first proposed for biological material by Basile Luyet in 1937 and adapted to whole organs by cryobiologist Greg Fahy in 1984, then made standard in cryonics after FM-2030 became the first person vitrified in 2000, and it continues to improve. The bet is that good preservation today is good enough for a sufficiently capable future to work with, and that the damage spares the information even where it harms the tissue. It is a real bet, not a certainty, and pretending otherwise would be dishonest.
"You will not be the real you"
If identity were some intangible essence, preservation would be hopeless. But the scientific basis of cryonics is information-theoretic: you are the pattern stored in your brain's structure, and if that structure survives, so does the person. The useful analogy is a water-damaged phone versus an incinerated one. Soak a phone and it will not turn on, but the data on the intact drive can be recovered by someone capable. Burn it to ash and the information is gone for good. The brain is the same. This is why the race against cellular decay matters so much: the goal is to preserve before damage crosses from information-obscuring to information-destroying.
The economic and societal 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. But almost nobody pays that as a lump sum. It is funded through life insurance, which turns a large number into a modest monthly premium and puts it within reach of ordinary earners. The "only for the rich" framing is examined in full in the ultra-rich-only fallacy; the short version is that the obstacle is usually priority and belief, not affordability.
"The money should go to other science"
From a short-term view this has some force. From a longer view it is weaker: the resources are mostly private, and the underlying research into preservation and cold-tissue medicine spills over into 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 rests on a factual error: 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, only periodic topping up. The energy footprint is modest and shrinks further with renewable nitrogen production.
"The future will not bother to revive you"
Maybe. But consider the two broad futures. In a better, richer future, reviving people who asked to be revived is cheap, fascinating, and arguably a moral duty; there is little reason such a society would refuse. In a collapsed or dystopian future, revival may not happen, but then preservation simply continues and the chance stays open rather than being foreclosed. The objection describes a delay in the bad case, not a disproof.
The ethical objections
The ethical objections, that it disrupts the natural order, that it is selfish, that you could not adapt to the future, are real concerns but mostly turn out to be objections to life-extending medicine in general, applied only to this case. We take them apart one at a time in is cryonics ethical and is cryonics selfish. The adaptation worry in particular tends to forget that revived people would not be dropped alone into a strange century; reintegration would be part of the undertaking, and they would likely have descendants with a strong interest in helping.
None of these objections is a proof that cryonics fails. The honest scorecard is a mix: a few strong cautions about method and institutional longevity, and a lot of weaker arguments that dissolve when you state them precisely.
That is the point of arguing against ourselves. A choice you have stress-tested against its best critics is a choice you can actually stand behind. If, after all of it, the lopsided logic of a small chance versus none still holds, then the objections have done their job and so have you.