No, you didn't make a mistake. The Lord's Prayer is Jesus' answer to the question "how do we pray?"
From my understanding and reading, the word's exact meaning seems somewhat ambiguous, but may be estimated from the context of the surrounding verses. So, I think the intent was partially conveyed, but without other primary sources it's difficult to have an absolute degree of precision.
This is why I think the argument you made is the most-likely-to-be-correct argument (contemporary use being influenced by the NT). It's also why I'm not sure there's any debate to be had here, nor why the question to you was raised. The Wikipedia article is quite clear that no other ancient texts from that time period contain the word.
From my understanding and reading, the word's exact meaning seems somewhat ambiguous, but may be estimated from the context of the surrounding verses. So, I think the intent was partially conveyed, but without other primary sources it's difficult to have an absolute degree of precision.
This is why I think the argument you made is the most-likely-to-be-correct argument (contemporary use being influenced by the NT). It's also why I'm not sure there's any debate to be had here, nor why the question to you was raised. The Wikipedia article is quite clear that no other ancient texts from that time period contain the word.
So what do scholars do? The best they can!