When cookies are made, the ingredients are added in precise measurements to create the cookie dough. Once the dough is mixed it is baked at a precise temperature for a specific amount of time. Deviation from the recipe can result in cookies that could be underbaked, overbaked, or that just don't taste good at all. What types of conditions could change the outcome of the recipe? Would it be possible to reverse the chemical reaction that took place when the cookies were baked?

it can be observed without changing the identity of the object.

it depends on what substance you're talking about as well as many other factors. in quantum mechanics, the observation of particles affects the observers ability to measure certain properties. for example: you can know the velocity of a particle, but you can't know it's position; or you can know it's position, but not it's velocity. it's like trying to find out where a grain of sand is by throwing other grains of sand at it. once you find out where it is, it's been moved. it's also like trying to find an answer to the question of whether or not a tree falling in a forest makes a sound if nobody is there to hear it. paradoxically, the only way to find out is to be there and hear it.

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