You couldn't tile directly over a plywood sub-floor because over time, the wood will be expanding. There are products you can use in between the plywood and tiles to keep them in place such as cement backer board.
Chat with our AI personalities
You would be better of removing the plywood floor completely - and tiling over the original surface.
No, plywood alone is not strong enough for ceramic tile. These floors require a very sturdy subfloor at least 1 1/4" thick before the tile. This requires either using cement board or a pored mudbed.
If you are installing a floating laminate floor, you can easily put it right over the tile.
Remove the laminate floor first
You would be putting a permanent floor over a temporary floor & that would not be wise. Might work but if it doesn't you lose it all...