Verbal protocols are usually used to study cognitive processes involved in various activities, as it is argued that they could make implicit processes of thinking visible and thus reportable. Here, it is proposed that verbalisation can also be approached from anothe rangle, namely as s discourse that contains linguistic markers of writers' revision activity. This small-scale study explores advanced foreign language (FL) writers' choices during on-line revision activity in a test environment. The strating point is the writers' focus on vertain phases in this activity that are signalles by the Finnish cognitive verbs meaning to think, combined with the linguistic markers of epistemic attitude during the revision processes. In these revision contexts, the writers explained how tehy solved problems related to their previously written texts.They revised problematic linguistic forms and functions both at teh micro and micro levels on teh basis of tehir strategic knowledge. The analysis showed that two types of revision activity were signalled by the epistemic attitude: change and pause in the process.Furthermore, contrary to a previous research study, the writers often appeared to focus on meaning-based problems related to lexical choices, which, however, were accompanied by hesitation and doubt regarding teh correct choice. Moreover, the advanced writers showed stratgeic knowledge during the revision process, as they used several strategies that were occasionally accompanied by implicit reasoning for decision-making.