before_sent:  What properties must a system have in order to succeed at these hard tasks? In this paper, we argue that an essential factor is the ability to form modular representations .
before_sent_with_intent: <clarity>  What properties must a system have in order to succeed at these hard tasks? In this paper, we argue that an essential factor is the ability to form modular representations .
after_sent:  What properties must a system have in order to succeed at these hard behavioral tasks? We argue that an essential factor is the ability to form modular representations .