Late Bloomer is commonly used to refer to young children who develop skills such as language, reading, or social interaction later than others of their age.
The Theory of Factual Evidence states that theories can be proven true if a sufficient amount of factual evidence is provided. All ways of proof involve the assumption that this theory is true. Despite the importance of this theory (without it, nothing could be proven), it has yet to be proven correct.
By basic definition, evidence is proof supporting a theory. It is the smoking gun and bullet taken from the crime scene. In other words, the gun and bullet (evidence) support the victim's death by gunshot wound (theory). Consider, however, the definition of theory -- a fact-based explanation. This means the victim's death by gunshot wound is a theory ascertained by reviewing many variables, one of which is evidence.