"What does that line mean?"

"Indeed, there are few more reliable ways of being expelled from a culture than continuing seriously to query its taken-for-granted intellectual framework. Playing the stranger is therefore a difficult business; yet precisely what we need to do with respect to the culture of experiment. We need to play the stranger, not to be the stranger. A genuine stranger is simply ignorant. We wish to adopt a calculated and an informed suspension of our taken-for-granted perceptions of experimental practice and its products."

-Shapin & Shaffer, Leviathan & the Air-Pump:
Hobbes, Boyle, and the Experimental Life