In a library, four friends - Laura, Mary, Neil, and Oscar - were studying together for an upcoming exam. Laura brought her own set of highlighters but left them on the table when she went to find a book. While she was away, Mary borrowed one of the highlighters without asking. Later, Neil saw the missing highlighter in Mary's possession and returned it to Laura's desk without saying anything. When Laura returns to her seat, what will she think about her missing highlighter?

Respond very briefly.
Laura may not realize that a highlighter was missing in the first place if she did not see it taken or does not remember the exact number she had. If she does notice that the arrangement of her highlighters has changed, she might be confused or curious about who moved them or why they were moved. Without having seen Mary take one or Neil return it, she can only speculate about what happened in her absence. Depending on the trust and openness within the group, she might simply assume one of her friends borrowed it and returned it, or it was moved accidentally. Without direct evidence or someone's confession, Laura lacks the information to reach a definitive conclusion about the situation with her highlighter.