I'll assume Andy that when required you can act as an adult. So the answer is complex, and it requires a sense of nuance or the concept remains opaque.
First of all, sex is not a true binary, so the term ''biological sex'' misses the target. If you simply set the binary as xx and xy you miss a number of people that are quite small in percentage terms, but large as a raw number, since a small percentage of 8 billion is a large number. Would you like an extra 0.2% of 8 billion as additional income? Few would reject it. So context is everything.
Gametes do not produce an accurate outcome either since not all people produce gametes, or if they do they may not be healthy gametes.
So reproductive pathway becomes the accurate framing if you want to make a strict binary. In my case, I am neither male or female on the reproductive pathway. I'm neither. So there is no binary distinction here that accurately puts me in either place.
Yes I'm in the subset of our species being xy (probably) so that at a cellular level, that suggests I'd be typically male, if only that was an absolute binary. But if you put me in a crowd of 99 cis women and you were asked to pick me out, your odds would be a lot worse than 99:1. So your perception would almost undoubtedly fail the test of ''what a woman is''. So perception is unreliable as a diagnostic tool.
Since the perception of harm comes from a belief that have an xy gene means that my behaviour is not just that of a man, but that of a depraved man is as wide a miss as you could make. It isn't so much genes that affect mindset, it's hormones. I have no testosterone and a similar hormone level to cis women, though mine is much more steady state as I have no sexual rhythm. So where does my mindset fit in, with men or with women. If you were able to ask those who know me, they've give you the most curious look and think you a ''pillock''. I don't hang out with men. It's not some inherent rejection of men per se. My genitals were not adjusted because I wanted to have penetrative sex with anyone - it was necessary to be affirming, in the same way that some women opt for a boob job, it isn't just about improving appearance like a face lift, it affirms identity. And yes immediately after the surgery, which is invasive, but not as invasive as say heart surgery, there was an appearance of road kill - however it heals, and remarkable quickly with little evidence of surgery remaining after 3 months.
So that's the biology lesson over with.
In life, science and law there is a need to give something an artificial identity, a deliberate falsehood, because without there is system collapse. In maths that falsehood occurs in a branch called complex numbers, where numbers are deemed to have an identity which is an otherwise mathematical impossibility - the square root of a negative number. Ask a calculator to evaluate the square root of minus four, and it will declare ''error''. However it's necessary to engineers to deem it a possibility.
To protect a prosecution witness to a major crime, we give them a false identity. They have a right to protection, therefore it is necessary of them to be given a different identity. Women who have been raped by a husband may assume a new identity, that is a prerogative. Otherwise people change their identity for all manner of reason. It's a right to self-determination, or a freedom if you will. And if you have a thing for Cheryl Cole, the law will permit you to change your identity to Cheryl Cole, and that does not imply any intention to transition, it's just a freedom that you can enjoy, nothing compulsory, completely optional. In this new identity the law will protect you on the grounds of sex.
So I've used the word ''deem'' a couple of times now, which leads to the next point about the nature of a deeming provision.
Now for the legal lesson, and I'm going to speed this up by use of Copilot Pro.
Please explain '' a deeming provision'' in UK law and give three examples of their use.
Certainly, (name redacted). A
deeming provision in UK law is a legislative tool that creates a
legal fiction—it treats something as having a particular status or effect, even if that status or effect doesn't exist in reality. These provisions are often phrased as “is deemed to be,” “shall be treated as,” or “is taken to be,” and they serve specific statutory purposes, allowing the law to operate more consistently or efficiently in complex scenarios.
🧠 What Is a Deeming Provision?
- It constructs a hypothetical legal reality to achieve a statutory goal.
- Used to simplify legal interpretation, fill gaps, or extend legal consequences.
- Its scope is strictly limited to the purpose for which it was enacted—courts won’t extend its effect beyond that.
As one judge put it:
“If you are bidden to treat an imaginary state of affairs as real, you must surely, unless prohibited from doing so, also imagine as real the consequences and incidents which, if the putative state of affairs had in fact existed, must inevitably have flowed from or accompanied it.” (East End Dwellings v Finsbury Borough Council [1952] AC 109)
📌 Examples of Deeming Provisions in UK Law
1. Customs and Excise Management Act 1979 (CEMA) – Schedule 3
- If a person fails to challenge the seizure of goods within one month, the goods are deemed to be duly condemned as forfeited.
- This was upheld in Revenue & Customs v Shaw [2016] UKUT 4 (TCC), where a tractor was deemed forfeited due to procedural non-compliance.
2. Income Tax (Employment and Pensions) Act 2003 – Section 471(3)
- If an employer provides an employee with the opportunity to acquire securities, it is deemed to be by reason of employment.
- In HMRC v Vermilion Holdings Ltd, the Supreme Court ruled that the share option granted to a director was deemed employment-related, triggering income tax rather than capital gains tax.
3. Inheritance Tax Act 1984 – Section 267
- A person is deemed domiciled in the UK for inheritance tax purposes if they were UK domiciled within the last three years or resident for 15 of the last 20 years. This affects how trusts and estates are taxed, even if the person is technically non-domiciled.
Why was a deeming provision necessary in the gender recognition act?
The
deeming provision in Section 9(1) of the Gender Recognition Act 2004 (GRA) was necessary to ensure that legal recognition of a person’s acquired gender had
full and consistent effect across UK law. Without it, trans individuals who obtained a Gender Recognition Certificate (GRC) would face fragmented or uncertain legal status.
⚖️ Why It Was Necessary
- Legal certainty: The provision states that once a GRC is issued, the person’s gender “becomes for all purposes the acquired gender.” This creates a clear legal fiction that their sex is changed in law, even though biological sex remains unchanged.
- Administrative coherence: It allows for consistent treatment across legal documents—birth certificates, marriage certificates, pensions, and more—without needing to amend every statute individually.
- Equality in rights and obligations: It ensures that trans people with a GRC are treated in law as their acquired gender in areas like succession, taxation, and social security, unless explicitly excluded (e.g. peerages or gender-specific offences).
- Judicial interpretation: Courts rely on this deeming provision to apply laws consistently. For example, in Goodwin v UK (2002), the European Court of Human Rights emphasized the need for legal recognition of gender identity, which the GRA sought to implement.
🧩 Why Not Just Change the Birth Certificate?
Changing the birth certificate alone wouldn’t suffice. Many legal rights and responsibilities hinge on
statutory definitions of sex and gender, and without a deeming provision, trans individuals could be excluded from protections or obligations that apply to their affirmed gender.
So Andy, yes, I am a woman, but not a cis woman, which is why the words, trans and cis are necessary in some conversations such as healthcare.