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2026 · Science

Megabase-scale human genome rearrangement with programmable bridge recombinases

Perry, Nicholas T.; Bartie, Liam J.; Katrekar, Dhruva; Gonzalez, Gabriel A., and 9 others

Verdict

UNSCIENTIFIC

Neither the paradigm nor the study inside it passes. The verdict is unscientific.

1·Study methodology · inside the paradigm

UNSCIENTIFIC

Does not follow the scientific method within Genomics / DNA Model.

2·Paradigm · Genomics / DNA Model

UNSCIENTIFIC

Fails the tests. The worse layer decides.

How the verdict is decided

The verdict grades both layers: the paradigm this study assumes, and how the study was carried out inside it. Both must be scientific for the whole thing to be scientific. A clean method inside an unscientific paradigm is unscientific. An unscientific method inside a better paradigm is unscientific. A split on either layer is mixed. The worse layer decides.

1·Study methodology

Did this study test its claim with methods that are independent, falsifiable, and non-circular?

UNSCIENTIFIC

This study claims that engineered RNA-guided enzymes can rearrange the human genome by inserting, cutting out, and flipping stretches of DNA up to nearly a million letters long. All three tests fail.

Independently Verifiable

Fail

The machines produced fluorescent signals and the model told them those signals meant DNA had been rearranged, but a stranger sees signals on a screen, not rearranged DNA.

Falsifiable

Fail

If the machines showed no rearrangement, the study would call it low efficiency or suboptimal targeting, not evidence that DNA cannot be rearranged.

Non-Circular

Fail

The sequencing tools used to confirm the rearrangement were built from the same DNA model the rearrangement claim depends on.

Why

They took human cells in dishes and delivered RNA and proteins into them. After treatment, they extracted chemical fractions and ran them through machines that gave off fluorescent signals. Software interpreted those signals as evidence that stretches of DNA had been inserted, flipped, or cut out. They reported efficiency percentages and specificity numbers from those readings. At no point did anyone see DNA being rearranged. They saw signals on a screen and the model told them what the signals meant. The tools that confirmed the rearrangement assume the DNA model to function. If those tools showed no rearrangement, the study would call it low efficiency or poor targeting, not evidence the model is wrong. No result in this design could have killed the claim.

2·Paradigm · Genomics / DNA Model

Does the framework this study assumes pass the three tests?

UNSCIENTIFIC

Independently Verifiable

Fail

Nobody has seen DNA, let alone watched it being cut, pasted, or flipped inside a living cell.

Falsifiable

Fail

When a DNA-editing tool fails, the field calls it poor design or suboptimal conditions, never evidence that DNA does not exist or carry a code.

Non-Circular

Fail

The sequencers and chemical assays that detect DNA were built from the DNA model they claim to verify.

Why

The DNA model says a substance inside cells carries a code that determines traits and can be edited like text. Nobody has seen this substance inside a living cell, let alone read a code in it. The machines that produce signals are real. The model tells you the signals mean DNA was read, cut, or rearranged. When an editing tool fails to produce the expected change, the field never asks whether DNA exists or whether it carries a code. They say the tool was poorly designed or the conditions were wrong. The instruments that detect DNA were built from the DNA model. The model confirms itself through its own instruments, and no failure is ever allowed to count against the premise.

From the study

Abstract
Bridge recombinases are naturally occurring RNA-guided DNA recombinases that we previously demonstrated can programmably insert, excise, and invert DNA in vitro and in Escherichia coli.
Abstract
We achieved up to 20% insertion efficiency into the human genome and genome-wide specificity as high as 82%.