Is it possible to switch from VFR to IFR and back?

Gig 601XL Builder writes:

Craig, the problems that many in this group has with Mx aren't the
questions. It is the fact that once and answer is given then he will argue
that the answer is wrong and then the tread goes to hell in a handbasket.

I don't argue that answers are wrong. I question them and expect the
basis for those answers to be explained. I'm not stupid enough to
accept anything I'm told at face value. If someone cannot explain why
he gives a particular answer, he is probably making things up as goes
along, and I cannot afford to develop misconceptions and bad habits.

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Transpose mxsmanic and gmail to reach me by e-mail.