Tomo Fujita Guitar Wisdom

I watched a couple of the theory videos and it wasn't really explained clearly why some notes are sharp and some notes are flat. I googled it and found a good answer and wanted to share it with you. Maybe it can be added to one of the early theory videos. Thanks!

"The simple answer is that in any major or minor scale we always use the letter names in ascending sequence (C D E F G A B C, etc.)

It follows, therefore, that in the key of F major the fourth degree of the scale must be Bflat, rather than A#:

Correct: F G A Bflat C D E F

Incorrect: F G A A# C D E F"

If it was mentioned before and I missed it then I appologize in advance. Thanks!

Here is Tomo's comment:

"Thanks so much for subscribing to my Guitar Wisdom. I am planning to make more lesson videos that explain Theory."

Another question over this lesson, is it okay to think/sing the notes of each key instead of applying the moveable DO RE MI system? I always try to do this for every scale.