Lesson-specific diagram for Evidence, uncertainty, source quality, and scientific communication. It visualizes the reasoning sequence tied to $\text{claim}\leftarrow\text{method+data+uncertainty+source context}$. Text alternative: A strong chemistry conclusion identifies the method, data, uncertainty, model assumptions, source quality, and what evidence would change the claim. Choose a representation that matches the chemical scale and evidence; do not infer more precision or mechanism than the data support.