Just messin' with your head!

From the Stanford Encyclopedia of Philosophy comes this quote:

The basis of a priori knowledge is not perception, introspection, memory, or testimony (cf. Casullo 2003, 29-30; BonJour, 1998, 7). If there were such things as telepathy and clairvoyance, they also would not be the basis of a priori knowledge (Casullo 2003, 149; BonJour 1998, 7-8). A priori knowledge and justification seem to be based on reason alone, or are based solely on understanding the proposition being considered.

So naturally 2+2=5, the sun is red, I am a martian, the moon is made of cheese, and the United States of America is currently a Democracy, are all a priori, right???