Who can tell carries a sense of uncertainty, suggesting that some things remain beyond definite knowledge or prediction. For example, how old Kalogeras sisters might be is something that can only be guessed at, as circumstances change and personal details are not always shared. There is a chance that someone knows, or that the information may become clearer over time, but for now, it remains uncertain. Life often reminds us that not everything can be pinned down, and sometimes the truth depends on possibility rather than certainty.