State the conclusion with the uncertainty included. One data point may support the hypothesis while another creates a risk or limits how strong the conclusion can be.

Then explain what the evidence collectively suggests and what information would resolve the conflict. That is stronger than pretending the case is cleaner than it is.

Good synthesis is judgment under imperfect information, not forcing every exhibit into the same direction. If useful, this guide on case interview insight generation gives more detail.

Mixed evidence is where synthesis actually matters imo.

say what leans which way + what you'd need to know next.