Making Choices
Often, your choices have no immediate risk or consequences. If you're exploring a starship and come across an intersection, the GM asks, “Which way do you go?” You might choose to take the corridor to the right or left, or climb through the maintenance shaft overhead. Once your choice is made, the GM tells you what happens next. Down the line, that choice may impact what you encounter later in the game, but in many cases nothing dangerous happens immediately.
But sometimes what happens as a result of your choices is less than certain. In those cases, you'll attempt a check.