I'll reference the source that YOU provided:
https://onlinelibrary.wiley.com/doi/10.1002/bies.202200173?af=R
With respect to your prior quote:
Quote:
Another reason for the wide-spread misconception about the biological sex is the notion that it is a condition, while in reality it may be a life-history stage.[33] For instance, a mammalian embryo with heterozygous sex chromosomes (XY-setup) is not reproductively competent, as it does not produce gametes of any size. Thus, strictly speaking it does not have any biological sex, yet. However, with a reasonably high probability we can predict this embryo to be on a developmental trajectory that will lead to becoming a reproductively competent (sperm producing) male. Hence, as an operational “definition” it may be justified to call it a “male embryo.”
I've added the portion that you left out.
"reasonably high probability" -- all that they are saying is that some markers typical of particular "developmental trajectories" -- hormones and genitalia for examples -- qualify as "proxy variables". They
correlate to a high degree with being "reproductively competent". But proxies are still NOT the same as the variable they're linked to, are STILL not the criteria for actual category membership:
In statistics, a proxy or proxy variable is a variable that is not in itself directly relevant, but that serves in place of an unobservable or immeasurable variable.
https://en.wikipedia.org/wiki/Proxy_(statistics)
A great many people -- including many biologists -- are unclear on that concept. You might want to take a gander at Griffiths PhilArchives post -- "What are biological sexes?" -- for his discussion of "operational definitions" which is what those proxies boil down into or are equivalent to. See:
https://philarchive.org/rec/GRIWAB-2
The Stanford Encyclopedia of Philosophy entry on scientific realism, written by Richard Boyd, indicates that the modern concept owes its origin in part to Percy Williams Bridgman, who felt that the expression of scientific concepts was often abstract and unclear. Inspired by Ernst Mach, in 1914 Bridgman attempted to redefine unobservable entities concretely in terms of the physical and mental operations used to measure them.
https://en.wikipedia.org/wiki/Operational_definition
Not easy to see the state of our gonads -- generally "unobservable" -- so we "operationalize" the concept by using traits that
correlate with them. In many cases they're adequate, but they are STILL NOT the criteria for sex category membership, at least by the strict biological definitions thereof.
I'll also add some additional commentary to this.
Among humans, embryos before about 6 weeks in have an undifferentiated reproductive system. ...
If you want to get super duper technical, I'd be willing to concede that prior to the sixth week of development, a human embryo has no sex.
Many thanks as that "human embryo has no sex" is the crux of the matter, the whole ball game. "Yuge" in fact ...
A great many people -- "biologist" Jerry Coyne in particular -- are dogmatically insisting that every last one of us is male or female from conception to death which obscures what are the actual criteria for sex category membership. Most people seem to view "sexless" on par with "Voldemort", although I see that Colin Wright, in the recent kerfuffle over Ian Copeland, tweeted that "sexless" is at least "theoretically" possible:
https://www.realityslaststand.com/p/ian-copeland-is-confused-about-the
Though not sure where I saw that particular tweet of his and I don't have access to that RLS post of his.
But I understand that you, in effect, favour Hilton's definitions -- "gonads of past, present, or future functionality" -- but what type of gonads do newly hatched clownfish have? Even those that are older but are still producing neither type of gamete? If human embryos, at least before 6 weeks, have "undifferentiated reproductive systems" and thereby qualify as "sexless" then why shouldn't that be the case for clownfish before they're "reproductively competent"?
Wikipedia's old article on "Sequential Hermaphroditism" -- at least before some feminists devotees of Judith Butler got their dirty mitts on it -- accepted that perspective:
Wikipedia: "If the female dies, the male gains weight and BECOMES the female for that group. The largest non-breeding fish then sexually matures and BECOMES the male of the group.
https://en.wikipedia.org/w/index.php?title=Sequential_hermaphroditism&oldid=890717544
Can't "become" a male if it is a male right from the moment of hatching as the current version insists is the case.
But that's the reason for making functional gonads as the
sine qua non for sex category membership. You in particular might want to take close look at Griffiths' paper on that score, and also the article in the Oxford Journal of Molecular Human Reproduction, although much of it is outside my own salary range:
https://academic.oup.com/molehr/article/20/12/1161/1062990 (see the Glossary for the definitions)
After that stage, however, we must fall back to the definition provided by your source: it's based on the reproductive strategy. And that reproductive strategy is expressed via the type of reproductive system that develops. We develop either a male system (that associated with the production of sperm) or a female system (that associated with the production of ova).
My source is still using Griffiths' "life-history stage" definition -- the same ones published by Springer, Molecular Human Reproduction, and the Oxford Dictionary of Biology -- whence the "yet". But what you're "falling back on" is still only the proxies for the "necessary and sufficient" criteria for sex category membership, i.e., functional gonads.
And, for example, "male reproductive strategy" is STILL only the reproductive strategies OF males. "male reproductive strategy" is, as I've argued above, like "female brains" and "male embryos" -- they're not male and female in themselves. It can't be a "male reproductive strategy" if it's not implemented by an actual male.