  All three of these acts have word-to-world direction of fit, and all three have conditions of satisfaction mandating that they are satisfied just in case the world is as their content says it is. Further, one who asserts, conjectures, or guesses that P is right or wrong on the issue of P depending on whether P is in fact so. However, as we move down the list we find a decreasing order of stringency in commitment. One who asserts P lays herself open to the challenge, “How do you know that?”, and she is obliged to retract P if she is unable to respond to that challenge adequately. By contrast, this challenge is inappropriate for either a conjecture or a guess. On the other hand, we may justifiably demand of the conjecturer that she give some reason for her conjecture; yet not even this much may be said of one who makes a guess. (The “educated guess” is intermediate between these two cases.)