Because it's hard to distinguish exactly where orange becomes yellow on the colour wheel, the concepts of orange and yellow are invalidated.
You're talking in riddles.
The transition from orange to yellow can be difficult to determine because they are colours on a continuous spectrum. But this does NOT apply to biological sex, which is NOT on any kind of spectrum... this is an irrefutable scientific fact. It is objective, observable reality.
In all humans, all mammals. and indeed,
most species of animals, there are biological males, and there are biological females. There are no other biological sexes. Even people who have DSD (who are often erroneously referred to as
"intersex") are still provably either biologically male, or biologically female.
People who push the
"sex is a spectrum" nonsense do so because they need to in order to argue for their position. TRAs are trying to rewrite science, and redfine words to mean what they want them to mean, rather than what they correctly and actually mean. The
"sex is a spectrum" nonsense is anti-science - if this is what you beleive, then you also have an anti-science worldview, which is probably why you also mistakenly believe that transwomen are women. In the UK, it is clear that they are not. The tide has been turning on this partuclar section of anti-science thinking, and that turning has accelerated considerably with the recent SCOTUK ruling. I expect this will continue as the world continues to back away from the madness.