Update README.md

README.md

@@ -47,9 +47,9 @@ Genetical Theory of Natural Selection](https://tinyurl.com/3we44pt4), which dire
 [proposal](https://tinyurl.com/5emfc5hb) of [Genetic Algorithms
 (GA)](https://tinyurl.com/mptr255h).
 
-2. Define the objective/cost/error/fitness function to be **minimized** for the optimization
-   problem at hand (in this library, the term **fitness function** is used, following the
-   well-established tradition of evolutionary computation):
+2. Define the objective/cost/loss/error/fitness function to be **minimized** for the
+   optimization problem at hand (in this library, the term **fitness function** is used,
+   following the established terminology tradition of evolutionary computation):
 
 ```Python
 import numpy as np  # for numerical computation, also the computing engine of pypop7