PTBer 4.d:24[2] :דלכן מה {כן}<נן> אמרין‏ : for if it is not so, what do we say?
See the entire entry for dlkn conj. otherwise

PTBer 4.d:24[2] :סתמה ור׳ יוסי הל׳ כסתמא‏ : if there is an anonymous opinion and one of R. Yose, is the law according to the anonymous opinion?
See the entire entry for stām, stāmā n.m. unspecified