[MauranKilom]

What do you mean with "lossy"? What information is being lost? Or do you just mean that there isn't necessarily a unique way to encode a given string?

[SemanticStrengh]

I mean that information is being lost https://arxiv.org/abs/1906.08237 See xlnet for the rethoric https://www.microsoft.com/en-us/research/publication/mpnet-m... Or mpnet which attempt to combine the best of both worlds information wise but still find that masked modeling is much less useful than autoregressive.