diff --git a/bip-0039.mediawiki b/bip-0039.mediawiki
index a4ae71dd..6fbff6be 100644
--- a/bip-0039.mediawiki
+++ b/bip-0039.mediawiki
@@ -24,8 +24,11 @@ BIP-0032 or similar methods.
 
 A mnenomic code or sentence is superior for human interaction compared to the
 handling of raw binary or hexidecimal representations of a wallet seed. The
-sentence could be written on paper, spoken over the telephone, or memorized as a
-brain wallet.
+sentence could be written on paper or spoken over the telephone.
+
+This guide meant to be as a way to transport computer-generated randomnes over
+human readable transcription. It's not a way how to process user-created
+sentences (also known as brainwallet) to wallet seed.
 
 ==Generating the mnemonic==
 
@@ -96,6 +99,11 @@ constraints on sentence structure and clients are free to implement their own
 wordlists or even whole sentence generators, allowing for flexibility in wordlists
 for typo detection or other purposes.
 
+Although using mnemonic not generated by algorithm described in "Generating the
+mnemonic" section is possible, this is not advised and software should compute
+checksum of the mnemonic sentence using wordlist and issue a warning if it is
+invalid.
+
 Described method also provides plausible deniability, because every passphrase
 generates a valid seed (and thus deterministic wallet) but only the correct one
 will make the desired wallet available.