Scientific method

I was talking to my boyfriend about the model and he said that it sounded like what I was saying is that everything is subjective. I said it is. Then he asked what about the scientific method where a hypothesis is chosen and then tests are run to find the truth. I didn’t have an answer but I want to understand this, too. Is it ever possible for someone not to insert their cognitive bias into results?

How I understand it is that the model works from inside out to understand the world. As opposed to physical matter informing us of what is true. Like, we use thoughts and language to describe circumstances (“the chair is red”) but still the concepts of red and chair are thoughts we’ve all agreed to the meaning of. Right?