In the original title, 'Hidden' was 'Latent' - communities that de-facto exist even though they are not explicit. 'Latent' would have been a more precise word, but 'hidden' is more accessible.
In the original title, 'Hidden' was 'Latent' - communities that de-facto exist even though they are not explicit. 'Latent' would have been a more precise word, but 'hidden' is more accessible.