Is it reasonable to assume that people seek to equate the marginal utility/price ratios of the goods that they purchase, if they have never heard of ‘utility’, let alone ‘marginal utility’, and...

Is it reasonable to assume that people seek to equate the marginal utility/price ratios of the goods that they purchase, if they have never heard of ‘utility’, let alone ‘marginal utility’, and marginal utility cannot be measured in any absolute way?