Pretty sure "and" after a comma is just fine, and in some cases downright necessary. Otherwise it would be rather hard to list anything- "cats, dogs, naked mole rats are all mammals" is a much worse sentence than "cats, dogs, and naked mole rats are all mammals".
And I don't think the rule against starting sentences with "and" holds much water either. Per Merriam-Webster, it's been used that way from the 9th century down through Elements of Style. I don't think there's a style guide in the world that can overturn that history.
lol just because someone got it wrong way back when and it found its way to print doesn't make it right, it has never been grammatically correct to begin a sentence with a conjunction. What are you conjoining? The previous sentence? Then it shouldn't be closed. If you're not conjoining it, then don't begin with "and".
Never mind style guides, just follow basic logic.
The single place where a comma can follow and is when listing components.
"x, y, z, & back to a." but never in the usage I quoted.
It did not follow a sequential listing in the post I responded to.
(Lists must contain more than 2 items and the ", and" should only come before the final entry.)
This is known as an "Oxford comma" & is optional.
Both instances that I quoted to are completely incorrect, grammatically.
"Pretty sure "and" after a comma is just fine, and in some cases downright necessary."
The comma you've placed before the "and" should come after it. The piece of your statement that is separate and is only there to act as qualifier is "in some cases".
Your sentence should read: "Pretty sure "and" after a comma is just fine and, in some cases, downright necessary."
Using ",and" is only really for linking independent clauses.
e.g. "It's raining, and I can't find my umbrella."
Both are independent of each other. Despite being linked, they each stand alone as a sentence in their own right. In this case it is grammatically correct to use ",and".
"I switched on the TV and we sat down to watch."
"I switched on the TV is independent, but "and we sat down to watch" is not, so should not be separated. In this case it is not grammatically correct to use ",and".
I do not mind about someone's grammar, it's not really worthy of debate.
The only reason I brought it up in the first place up was because of the irony, that the original guy I responded to was picking up on poor grammar.
As such I found it amusing & ironic that his post contained those 2 elements.