Do professional programmers use guides and manuals?

Question

In your opinion, a programmer with 6 years of experience in several languages, such as Python, PHP; If he still uses the guide to remind some functions or libraries, is this a sign that he is unprofessional?
In general, in your opinion, someone who has 6 years of experience should memorize all the functions of a language. And can he write a program without a guide at all?
For example, to write a professional website using Django or Symfony, to speed up the work, sometimes it is necessary to design the database of the previous program in the new program with changes, or some of the code written in the previous program. Use in the new program. These cases show that the person is unprofessional, at least from the point of view of members of a programming group

Answer 1

According to me, no. If a programmer uses the internet/guides, he is not unprofessional. You can't ever possibly remember each and every function of each and every library. If you work with it daily, then it automatically gets imprinted in your mind. In my opinion, the number of memorised functions and methods is not at all a way to judge a programmer. How good a programmer is depends on his/her thinking skills.