Yes. It is called "parroting" and is an effective communication tool often used by therapists and sales people to build trust.
There are certain words that each of us use everyday.
There are certain thoughts, hopes, dreams, feelings, that we each share.
How we put those two together, and how we put them out there... nah... plagerism is real.
I mean, could two people both say What the Fvck at the same time, about the same thing... yeah... but if they both wrote a song about it, they would be completely different.
A person knows when they have taken words from someone else.
It is normal for someone to copy others words without realizing
I do that sometimes. Just sort of imitate something under my breath if I'm in public and people might think I'm crazy. I'm not very normal though.