Thank you for this valuable addition. Yes, you are absolutely correct. Understanding the relationships between ITTOs is much more important than memorization.
As I can see from several posts here, a lot of people have shared similar lessons learned as that of mine. I have only one important point to make. If you can logically link Inputs-processes-outputs and understand the processes there is no need to remember IITO. My suggestion is to spend more time understanding the ITTO than remembering them.
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