Humanism has some very good principles which I agree with but I believe that they initially came from God and religion but those who did not accept God rebranded them for their own.That's not what I said, but yes, there is a reliable method for determining which statements deserve to be called knowledge by the definition provided, and which statements should not be considered that. What I was commenting on is the loose use of the word truth by the faithful, who use it to describe whatever they believe including many unfalsifiable religious claims believed by faith.
Their teachings don't map onto one another well except with a few principles that are not the product of any religion, although religions might teach them. The names of the days of the week are not names for the sun, and they are not mistaken for it, either. Humanism shares many of the principles of the religions, but those ideas don't come from them. They come from the same place the religious got them - human nature as shaped by evolution.
Moreover, if you reflect justly, you will see that these good actions of other men who do not know God are also fundamentally caused by the teachings of God . . . When men saw that these actions were considered beautiful, and became the cause of joy and happiness for mankind, they conformed to them. ‘Abdu’l-Bahá