Final answer:
Irregular contractions occurring every 10 to 15 minutes and failure to dilate confirm that the client is not in labor at this time.
Step-by-step explanation:
The assessment finding that confirms to the nurse that the client is not in labor at this time is irregular contractions occurring every 10 to 15 minutes. In true labor, the contractions become more frequent and powerful with time, and they do not abate with hydration or rest. Additionally, the cervical dilation and effacement are key indicators of labor progression, and in this case, the cervix is not dilated.