there will be 8 valid final words for any given 23 words.
is that good or bad?Quote
For a 12 word phrase which has 4 bits of checksum, there will be 27 = 128 possible valid final words.
that really doesn't seem ideal. it makes me wonder about this whole checksum thing and if it's really all that important or just a gimmick. i guess the argument against checksums is if you store your seedphrase correctly there should be no need for error correction and I do tend to agree. can't write down 11 words? then you got bigger problems.
such as not caring enough about your money.