Is this grammaticaly correct?

looks right to me.of course, I would've said "may not be entirely", but that's my style.I'm not sure about the forced part."As I have written previously, the chronology of the events I remebered may not be entirely accurate"
???depending on the effect, it can be better to be the average bum. for example, close to the end of Grapes of Wrath, there is a powerful passage, all dialogue, but it is said in plain spoken words.

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All a man's knowledge comes from his experiences