ABSTRACT
How do we come to know other persons (or they us)? Through what means do we come to hold beliefs about them which we take to be justified? Often we learn about them without really trying. In thecourse of our everyday interactions with them we form irnpressions, tentative at first perhaps, which subsequent experience of them either increasingly confirms, complicates, or else negates. jack, Jill and Julie all seem very vivacious when first we meet them; but longer acquaintance indicates that while Jack is always so, Jill is so only when in the company of Jack (though in quite a different way from hirn), and Julie is never observed to be so again.
