However, there is no to evidence to support his theory.

More research needs to be done to provide evidence to support this theory.

There is little or no evidence to support this theory.

But I would like to hear a little more evidence to support your theories.

He doesn't have enough evidence to support his theories just yet.

There are also a significant number of place names which do not support this theory.

There are however no direct evidence to support this theory.

There are several sources of evidence to support this theory.

However, no evidence to support this theory has ever been discovered.

However, there is no contemporary evidence to support this theory.