What if I am guessing? Is the world going to end. Should I run to the references mindlessly without using any logic? Or is there some use in trying to understand a function by it's use? Part of the learning experience is examining things you don't understand. looking at their parts and the environment they are in to ascertain their function. I am sorry if playing is not excepted here but I can't help it. I love to play. I learn most from play! From the very start of this thread I have been playing with the functions looking at how they work. Trying different approaches. So what all of that is wrong?? How can anyone learn without play. Just reading a manual will make you a great parrot but not a good programmer. It's by the use of the functions that you learn. And yes guessing their function then looking to the references to see if your observations are correct. Last time I checked that was part of the scientific principal.
Observation
Hypothesis
Experimentation
Conclusion
So what here am I doing wrong in your opinion??? You say I should just RTFM I say without observation that is useless!!!