nsmarkop
commented
6 years ago This could be because the main CAS dictionary only contains entries for 곬, 돐, and 옰 for syllable blocks using the ㄽ final syllable so they just figure needing 골 수 and 돌 수 is rare enough not to care?
-ㄹㅅ is normally used in syllable block logic to make the final syllable ㄽ which makes sense.
However, according to the CAS theory book -ㄹㅅ is the pattern for ㄹ 수 during syllable block logic as well. A note points out that for 올 수 you need to use ㅇㅗㄹㅅ instead of ㅗㄹㅅ, that latter taken by 옰, but has no mention of this conflicting for other ㄽ words.
At first I thought this may be a case of the CAS system not actually letting you type any ㄽ syllable blocks other than 옰, but that does not seem to be the case as elsewhere in the theory book when they first introduce -ㄹㅅ it uses 곬 as an examples,which with the new rule would output 골 수.
It is also clear that -ㄹㅅ does not mean using it individually rather than during syllable block logic should output ㄹ 수 due to context and the fact that -ㄹㅅ used individually is {^}로서.