Would you put a comma here:
"In common parlance[,] it's come to mean somebody who stonewalls."
What about now:
"And in common parlance[,] it's come to mean somebody who stonewalls."
The "and" makes me not want to put a comma because it comes before the prepositional phrase, making it no longer an introductory phrase. Right?
Would you use a comma if there were other words before it, like:
"And also I believe that in common parlance it's come to mean somebody who stonewalls."
Can anyone cite the rule for it in either Morson's or Chicago Manual of Style?
Thanks!