why least square is not suitable for Logistic regression

http://logisticregressionanalysis.com/86-what-is-logistic-regression/

http://logisticregressionanalysis.com/55-why-regular-regression-does-not-work/

神经网络基础—逻辑回归(Logistic Regression)+案例实现

https://blog.csdn.net/sdulibh/article/details/49997753