Philosophers differ on how we know what is good. Emotivism ...

[P68T]

Philosophers differ on how we know what is good.
  Emotivism maintains that when we say something is good,
  we are showing our approval of it.

 
  What will be an ideal response?

Question 2

Philosophers differ about whether our moral judgments
  refer to something objective, or are reports of our subjective
  opinions.

 
  What will be an ideal response?

[Carissamariew]

Answer to Question 1

Instead of describing
the item or experience, we are recommending it to others.
Intuitionism claims that good or goodness is known
through our intuition. We have some intuitive knowledge
about ethical truths.

Answer to Question 2

Those who say that ethics is objective believe that values are
objects available for knowledge. The objectivists maintain
that the things we desire are not good; instead, we ought to
desire things that are good. They emphasize the goodness of
the thing-in-itself.
Those who believe ethics is subjective claim that value
judgments express a subjective opinion. Moral judgments rest
upon subjective experience; the things that we desire are
good.