If you choose to believe it was false, I will not try to convince you otherwise. [Kaoru doesn't sound accusatory, though.]
There are other reasons that the kit would not detect something properly. Though Miss Sto Helit has said that it would be "breaking the rules" for Mr. Beat's strange body itself to affect the color, there is no proof of that. The liquid turning blue is not written in the manual at all, after all. I could go on, but I will spare you and say instead that you must search for this proof.
no subject
There are other reasons that the kit would not detect something properly. Though Miss Sto Helit has said that it would be "breaking the rules" for Mr. Beat's strange body itself to affect the color, there is no proof of that. The liquid turning blue is not written in the manual at all, after all. I could go on, but I will spare you and say instead that you must search for this proof.