Interesting to study that kind of language as a student. I do think that !!

Well . . . If we do do "do do", do do is doable.

I can say that it's common in English to use the verb "do" for emphasis in sentences, especially when the speaker wants to emphasize that they have done something, or that they do indeed do something. For example, "I do like ice cream" emphasizes the speaker's preference for ice cream, while "I did do my homework" emphasizes that the speaker completed their homework. While it may seem repetitive, using "do" for emphasis is a perfectly acceptable and commonly used practice in English. It is important to note, however, that the context and tone in which the sentence is spoken can also help clarify the meaning of the sentence.

We do do that.