Developed under influence of strong psychoactive substances

There are few, if any, LSD researchers who would give credence to this demonstration, but nonetheless there are instances of less extravagant LSD accomplishments which came about through memory enhancement. The most notable and the one most often used as illustration is language learning. The process is similar to that of technical and creative problem solving. A student, who learned enough German in a week to enroll for a second-year college course in the subject, describes the technique:
It was a week before registration and it depressed me tremendously that I had not spent the summer learning German, as I had planned. I had intended to give myself a crash course so I could take second-year German, which I needed for my study in physics. I had heard of a woman who had learned enough Spanish in a few days, via LSD, to speak it fluently when she had to go to Mexico on business. I had taken LSD before, and while I couldn't see how she did this, I decided it was worth a try.
I hadn't even gotten around to picking up a textbook, but I did have a close friend who knew German well and who said he was willing to "sit in" while I took the drug and try to teach me the language. Fortunately, I knew something about conjugation and declension, so I wasn't completely at sea.
I wanted to get worked up and feel involved with the language, as it seemed that this must be at least part of the key to the problem, so I asked my friend to tell me about Schiller and Goethe, and why the verb came at the end. Almost immediately, after just a story or two, I knew I had been missing a lot in ignoring the Germans, and I really got excited.
The thing that impressed me at first was the delicacy of the language (he was now giving me some simple words and phrases), and though I really messed it up, I was trying hard to imitate his pronunciation as I had never tried to mimic anything before. For most people German may be "guttural," but for me it was light and lacey. Before long, I was catching on even to the umlauts. Things were speeding up like mad, and there were floods of associations. My friend had only to give me a German word, and almost immediately I knew what it was through cognates. It turned out that it wasn't even necessary for him to ask me what it sounded like.
Memory, of course, is a matter of association, and boy, was I ever linking up to things! I had no difficulty recalling words he had given me—in fact, I was eager to string them together. In a couple of hours after that I was reading even some simple German, and it all made sense.
The whole experience was an explosion of discoveries. Normally, when you've been working on something for a long time and finally discover a solution, you get excited, and you can see implications everywhere. Much more than if you heard someone else discovering the same-thing. Now this discovery thing, that's what was happening with me—but all the time. The threshold of understanding was extremely low, so that with every new phrase I felt I was making major discoveries. When I was reading, it was as though I had discovered the Rosetta Stone and the world was waiting for my translation. Really wild!
After "Falling in love with German," on the basis of this one LSD session this student then went on the following day to read Mann's Dr. Faustus. He had both the original text and an English translation. By the time he had finished the novel, he found that he was scarcely referring to the English version. He also discovered that in having read that much German, he had developed a feeling for grammar structure and word endings that was almost intuitive. When his friend questioned him, he said he could not readily explain what the third-person singular past-tense ending was, but he demonstrated that he could use it. In this sense, he had learned the language as a child learns it, not as it is taught in formal instruction. When he registered for German 210, an intensive reading course, the following week, the instructor expressed skepticism when he heard the student was self-taught. Upon testing him, however, it was soon evident that his German reading comprehension was well above average.

This begs the question, do we need guide books with psychoactive drug pairings, similar to wine and beer pairings for food?