Not necessarily. You can build a solar still with some minimal supplies (clear plastic, container). It would not give you large quantities, but you will live.

I would probably scare to death if i been on of the these accident LOL !

Under some circumstances you can get enough water from food to survive. Obviously not Datrex rations! If you have food with a high water content (eg some plants, some parts of a fish, etc) you can stretch any available water a lot farther.

I'm not so sure that the water you get from any food source (even watermelon) makes up for the water used in digesting the food. So without a water supply, I personally wouldn't eat. I might suck the water out of a fruit, vegetable, or fish... but I wouldn't subject the remainder to the digestive process unless I had additional water.
But YMMV

Good point, but I understand that an apple is 90% h2o by weight, which sounds pretty good. There ought to be some definitive research on this topic. Anyone?