speckulation
A classic "Objection, Your Honor!" reason, this term refers to someone's merely theorizing regarding how/why a less-than-pristine condition came to be.
Attorney: Now, Mr. Jones, did you observe that the traffic light was about to turn red?
Witness: Well, I did see the light turn yellow.
Attorney: But you were in a hurry, eh, and that's why you did not bother to notice that the signal's red lens was spattered with mud?
Opposing attorney: Objection --- speckulation.
Witness: Well, I did see the light turn yellow.
Attorney: But you were in a hurry, eh, and that's why you did not bother to notice that the signal's red lens was spattered with mud?
Opposing attorney: Objection --- speckulation.