The sentence makes no sense to me as is. I translated as "If I have learned one thing, it is this," but was rebuffed. What does it mean, then?
Thanks! This is fixed now :)
Your translation is fine.
Totally agree. I reported it and included your sentence as one of my suggested translations.
Your version is a better English translation of this sentence, in fact.
If I have learned one thing, then this.
If I have learned anything, then this.
This sentence its just strange. I also translate 'Wenn' with 'When' i think its closer to english but i don't know
All I can say this that "If I have learned one thing, then that.", which is an approved answer, doesn't make sense in English.