A shark's fin and a tiger's claws
A spider's legs and a horse's legs
A monkey's tail and an elephant's tail
A man's arms and a bird's wings
perform the same general function
are only found in highly developed animals
are genetically related
come from different embryological structures
units of grammar
Features of an animal's anatomy
difficult to understand
easier to understand through examples than through definitions
impossible to explain
simple to define but hard to apply
'of the same kind'
'of the same place'
'of the same race'
'of the same destiny'
The door is to be shut
let the door be shut
The door may be shut
The door will be shut
many more information must be reviewed
is necessary to review more
another information must to be reviewed
we must review much more information
A general concept is introduced , examples are given , and a conclusion is offered.
Two proposals are suggested and support for both is offered.
Two definitions of the same concept are compared.
A contrast is drawn between two concepts be means of examples.