Wrong. You cannot deconstruct a bar chart into its constituent tick-data. It's derived, but not expressed (as tick data).
If what you mean is that you cannot take a bar of a 1 minute chart and produce the individual tick data from this then of course I understand. But a 1 minute bar is certainly made up of all the ticks.
Edit: Its like taking a 20 megapixel image and resizing it down to 1 mp. You cannot then go back up to 20 megapixels... the individual pixel info for all 20 megapixels is gone.