Reasoning
Each source is treated as a single perspective. From the first source, 2011 and 2025 both have top confidence (1.00); from the second source, 2011 has high confidence (0.90). Aggregating confidence across sources shows 2011 has the strongest overall support (1.00 + 0.90 = 1.90) compared with other years, which are supported by fewer sources or with lower total confidence. Therefore 2011 is the resolved launch year.