I already qualified that I meant objective in two different senses and conceded that pure logical objectivity is not attainable through the scientific method.

Objective in the second way means that people performing the same actions will get the same results regardless of cultural or personal biases.

Observer bias refers to the interpretation of the data, and the construction of a model using that data. Bias also exists in the formation of theories which determine which experiments will be done.

However, two people performing the double slit experiment, for example, will find the same results as long as they follow the same methodology. The idea of the double slit experiment and what the data mean are of course up to interpretation and that interpretation will have some amount of bias.

This is the same as saying basketball games have objective scores. The score is what it is regardless of who is reading the number on the scoreboard or who is playing the game. The rules of the game are arbitrary in the same way that an experimental hypothesis and methodology are arbitrary. What the score means is subjective to the fans in the same way that data interpretation is subjective to the observer.