Note: in Gzeaul mythos, the Tree of Knowledge bears fruit, which represents teachings that fulfil and bring joy. It also casts shade, representing wisdom and understanding which protect and bring respite.
In Gzeaul ecology, "rootnuggets" are crystallized nodules of pungent, diseased loam. It's heresy to suggest that the Tree of Knowledge would ever suffer from rootnuggets, but if you want a heretical epithet that means both "inconvenient truth" and "this really stinks," there's only one word for the job.