Translator's life can be very intersting. People who translates shall carefully handle the delicate differences lie in both grammar and meaning.

Oringial Latin Verse Quoted：Cogito, ergo sum.
Oringial German Verse Quoted：Ich denke, also bin ich.
中译： 我思故我在。


Obviously, there is no overt evidence indicating a strong causal relationship between the two clauses "Ich denke" and "also bin ich"; yet "also" (set in the beginning of the sentence)seems more like a simple juxtaposition of two coexisted facts, or just a light "and hence" to me.

However, in the targeted chinese translation, without a emphasized reasoning indication "故", the inherent logic in Chinese language is lost, which shall not be allowed, thus I once also heard about another version of this famous saying from German: "我思且我在"。