Pose two questions in response to at least two different posts.  Your questions should be very specific as to what you are asking or critiquing in regard to anothers post and also as to what further points of elucidation or clarification you are situating in your questions.
Respond to at least two other posts in the form of a critical commentary.  Your critical commentaries do not need to ask any questions, but rather they are vehicle for you: to further develop a point or argument about a text that someone else began, to reiterate in your own use of language what someone else is trying to articulate, and this is also a space to make a case against someone’s argument or position with supporting evidence from the text.