"Quite easily" isn't true in most cases, but embeddings are sometimes reversible. We know this because programs like Stable Diffusion sometimes output near-perf

"Quite easily" isn't true in most cases, but embeddings are sometimes reversible. We know this because programs like Stable Diffusion sometimes output near-perfect copies of training data when given the correct prompt, and generation of that image is based on word and image embeddings alone.