What is the difference between atheists and agnostics? Why does Pi feel atheists have a faith? Why does he dislike agnostics?

Pi here, in a short chapter, elucidates his opinion on atheists and agnostics. He sees atheists as capable of belief in God, for they have always had faith, just faith in science, rather than in God-which Pi believes is not inherently incompatible. On the other hand, the agnostic's doubt is to him an active choice not to believe, not to have the 'better story.'

What does "animals anthropomorphicus"mean?And why is it so dangerous