From the linked webpage readme:
2.1 Classify. Each file is labelled permissive (at least one permissive license detected, no conflicting non-permissive license), no_license (no licenses detected, or only non-license legal texts such as CLAs), or non_permissive. The permissive allowlist follows the Blue Oak Council list plus licenses categorized as Permissive or Public Domain by ScanCode. Files classified as non_permissive are excluded from both released datasets.
From https://www.bigcode-project.org/docs/about/the-stack/:
v1.1: The three copyleft licenses (MPL/EPL/LGPL) were excluded and the list of permissive licenses extended to 193 licenses in total. The list of programming languages was increased from 30 to 358 languages. Also opt-out request submitted by 15.11.2022 were excluded from this ersion of the dataset. The resulting near-deduplicated dataset is 6TB in size.
So MPL/EPL/LGPL are already not part of the dataset.
So… why were they in there? Was this added for v1.1?
"one permissive license" - So if my project includes a lib and I include the license file for that for the license notice…?