From the Word Biblical Commentary on Daniel:
The quasi-predictions begin this process by interpreting recent history in the light of Scripture. They are not indulging in mere theological apologetic, but in a radical theological necessity (Fishbane, Interpretation, 510–11 [and see 509–22 generally], against Hartman, ―The Functions of Some So-called Apocalyptic Timetables NTS 22  1–14). Nor is it the case that the mere—pretended!—ability to predict the future in 11:2–39 gives grounds for believing the actual prophecy in 11:40–12:3. It is rather the quasi-predictions’ ability to make sense of the past by relating it in the light of Scripture that implies grounds for trusting the actual prophecy’s portrait of what the future will bring, painted in the light of the same Scripture. When they speak about the past, they do so on the basis of having historical data, and scriptural text as a means of interpretation. When they speak about the future, they have only scriptural text, and are providing an imaginary scenario, a possible embodiment of that text, which is not to be pressed to provide (or be judged by) historical data. Its object is not to provide historical data but to provide scriptural interpretation of what the events to come will mean. The seer implicitly wishes to commend a certain form of behavior, namely, resistance to Seleucid/reformist pressures. His explicit focus, however, is a cognitive one. He aims to provide a way for conservative Jews to understand their present experience, looking at it in the light of various scriptural texts. The supernatural being provides this for the seer (10:1, 14); the ―discerning‖ provide it for the multitude (11:33).