"Can ye not"

2. Matt. 16: 3
     3 And in the morning, It will be foul weather to day: for the sky is red and lowring, O ye hypocrites, ye can discern the face of the sky; but can ye not discern the signs of the times?
3. Mosiah 27: 15
     15 And now behold, can ye dispute the power of God? For behold, doth not my voice shake the earth? And can ye not also behold me before you? And I am sent from God.