Most reasonably educated Guardian readers would, I faintly hope, have recognised the phrase "unsynthesised manifold" as an English version of a basic concept in Immanuel Kant's Critique of Judgment, first published in English in 1790 and familiarised in Britain by the work of Coleridge and just about anybody else who writes about aesthetic theory.And if you're as disappointingly - and, I faintly hope,untypically - ignorant as I am, here's her definition of the phrase:
The "unsynthesised manifold" is, in the original sense, everything that is out there, regardless of whether we perceive it or not. As we can't sensibly talk about matters of which we are unaware, we can use the expression more usefully to describe the endless flood of undifferentiated sensory data we accumulate throughout our waking hours. Our conscious and subconscious attempts at organising this stuff and getting it to make a kind of sense are attempts at synthesis. Because of the way the brain routinely edits and translates the raw data, what we perceive is not reality itself but a model of reality as encoded by our individual software, even before we start trying consciously to make sense of it. Most of what we perceive evades conceptualisation, and is neither dreamed nor recollected, though sometimes we can fish it out under hypnosis.
So now we know.