Yes, this is exactly true among the popular FOSS licenses. The attribution licenses such as ALv2, BSD, MIT, etc. which are generally considered to be "permissi

Yes, this is exactly true among the popular FOSS licenses. The attribution licenses such as ALv2, BSD, MIT, etc. which are generally considered to be "permissive" still require attribution, and this condition is not upheld by popular LLMs. Of course, the copied material has to be judged substantial enough for the license to apply in a court of law, which is a human-arbitrated threshold. It will most likely be a copyleft author who eventually brings a court case, but the attribution licenses do not allow for LLM usage either unless the LLM provides attribution and preserves notices as spelled out in the licenses.