"based on guess" is grammatically correct and can be used in written English.
It means that something is derived or determined by making an educated guess or estimation. Example: The scientist's conclusions were based on guess as he did not have enough evidence to support his theory.
"This evidence-based entrepreneurship is not just based on guessing, it's based on the fact that we are now talking to a ton of people," says Blank.
Most codes using a relatively simple substitution method are most easily cracked by doing a simple plug-and-chug, figuring out the letters one by one and patiently figuring out the code based on guesses.
Such thinking is based on guessing and the interpretation of one partner.
The truth is that no-one knows and no-one can know because all the figures being bandied around today are based on guessing how rich foreigners might behave in the future.
The numbers will be based on guesses about what will happen to the economy.
Because of the gaps and contradictory testimony in the historical record, portions of Ms. Schiff's narrative are necessarily based on guesses and hypotheses.
Take a competition based on guessing something, such as the number of jellybeans in a barrel or the weight of a cow.
"The family decides based on guesses: the doctors make educated guesses, which they impart to the family, and the family then tries to make the best decision," Dr. Schneider said.
"We'd do lotteries based on guessing the number of marbles in a jar," says Eytan Elbaz, his younger brother, who has worked with Gil and now has two start-ups of his own.
But this whale was much larger than the killer whale, growing to be about 60 feet long based on guesses made from the skull size, about the same as a modern sperm whale.
