This study set out to examine the evidence that the widely accepted so-called bilingual advantage has fallen a victim to a bilingual highway bias - the idea that bilingualism is supreme to monolingualism in all spheres, starting with cognitive and expanding its hegemony to a cultural sphere and beyond. This work does not set a goal to disprove bilingual benefits, but rather introducing a clear framework of bilingualism by discussing decisive criteria of the bilingualism construct - how reality is being conceptualised within a bilingual mind, what image does bilingualism bear and what advantages and disadvantages can be derived.