Destiny and Choices

It makes a lot of difference. considering that the event that is being talked about is sufficiently close that the person could have enough time to prepare to attend, whether he/she uses the word "when" or "at what time" to attempt to know the time of the event, tells a lot about the attitude of that person towards attending that event. If observed carefully the use "when" tell us that the person is not really interested but might attend, on the other hand use of "at what time" confirms that the person is exited and lookin forward to attending to the event.

Though a language can hardly evolve to a point where it can be used instead of an emotion, some words make it obvious what we have in mind. They are used lightly but if we give enough attention we find that words we use reflects on the a person's state of mind, his culture, the patterns he has in his mind. It is said that face is the index of mind, i believe that face is a bit hard to be interpreted. Words that are spoken the tone of it and the other noticeable details of speech are much easily diagnosed to mean anything. Body language though gives a clearer indication of the state of mind its has too many factors to be able to be interpreted.