random crack pot theory i just came up with in 0.5 seconds:

the statue they mean is the big egyptian one and there is something near there that wouldve been covered by its shadow at a certain point if it were still standing and that something has shown these people "the truth" about something, which if frank, miles or anyone else had seen they would know too which is why they asked them that, cos if frank etc had seen it theyd be on the same level as those ppl then theyd be on the same side

makes no sense dont worry