You said it yourself, and you still don't get it.
A Christian does not have to prove the Theory of Evolution is false, it is False by the use it's own declaration, "I am a Theory of Evolution"
THEORY:
A proposed explanation whose status is still conjectural and subject to doubt, requiring more study.
Abstract knowledge or reasoning a speculative or conjectural view or idea.
A set of hypotheses related by logical arguments to explain ones beliefs.
IDIOMS:
In theory , ideally; hypothetically:
Word Origin:
1590s, "conception, mental scheme,"
from Late Latin theoria (Jerome),
from Greek theoria "contemplation, speculation, a looking at, things looked at,"
from theorein "to consider, speculate, look at,"
from theoros "spectator,"
from thea "a view" + horan "to see"