if you are just jumping into a thought then it isn't wrong.
example:
So today Dustin and I....
if you are doing a proper sentence then yes it is considered and error
I think it’s the American civil war?
Answer:
The correct answer is making a mistake. The answer reinforces this idea through the complete text in several ways. To mention some: he explains how conditions affect routes or distances; he also points out how inexpert travelers underestimate the weather and the conditions that maximize any kind of accident or small issue; he also criticizes the "no fear" philosophy that shouldn't be applied in Alaska. Survival is Your Own Responsibility was written by Daryl R. Miller, a ranger for the National Park Service, and it talks about his experiences with Denali, the tallest mountain in North America. It also gives Denali National Park its name.
I would go with the last sentence.
The question is whether those phrases are speaking of the same person :
<span>A. her friend and former room-mate
- this is the same person, if it was two people, it'd be "and her"
B. </span><span>the winner and still champion
-again, the same person, requires singular verb
C.</span><span>The chief and foremost expert
-again, the same person: requires a singular verb and actually has a singular verb, correct answer!
</span>
I insist you go first
the park appealed against closure
a wisp of hair