"Based on the information that ~, …." ~ refers to something learned from others or observation; … expresses the speaker’s judgment, intention, or action toward others.
例:
1. その箱、もう使わないんですか。使わないなら私にください。
You're not going to use that box anymore? If you're not, please give it to me.
2. ああ、あしたは雨か。雨ならサイクリングには行けそうもないね。Ah, it's going to rain tomorrow. If it does, we probably won't be able to go cycling.
3. その本、読んでしまったのなら私に貸してくれませんか。If you've finished reading that book, could you lend it to me?