Check for matching words like "All," "some," "many," etc. If the stimulus argument has a conclusion like "So, at least some mammals are cats," then look for an answer that has a conclusion that has something similar to "at least some." An answer that had an absolute term like "All" or "every" would be wrong in that case. Matching the "tone" of the conclusions is pretty important, IMO. A strong conclusion in the stimulus will go along with a strong conclusion answer choice.