a ciegas

= blindfold, blindly, blindfolded, in the dark
Ex: No president can go blindfold: some assistance is necessary. Ex: If experience is carefully analyzed and not blindly followed, it can be extremely useful. Ex: The study presented the narrative task to the children as a game in which they had to help a blindfolded interlocutor find out what happened in the stories. Ex: Perhaps instead of arguing, and rushing around in the dark, the time has come to follow our Danish and American friends and begin to find out what we are doing.