1. The problem states: Evaluate the expression $1+1=1$ and verify if it is true. 2. The expression $1+1=1$ is an equation claiming that the sum of 1 and 1 equals 1. 3. Using basic arithmetic addition, the sum of 1 and 1 is calculated as: $$1+1=2$$ 4. Since $2 \neq 1$, the equation $1+1=1$ is false. 5. Therefore, the correct evaluation is $1+1=2$.