This statement, regardless of context, is a statement regarding an inductive argument. A valid deductive argument is one where the premises guarantee (prove) the conclusion. An inductive argument, is one in which the premises do NOT guarantee the conclusion.
If you find yourself “weighing your options” or “gathering evidence” then you are usually constructing an inductive argument. The strength of an inductive argument is based on how well the premises support the argument or how many supporting premises there are. A single confirming instance may increase the likelihood of the conclusion, but in an inductive argument, it can never “prove” (guarantee) the conclusion.