What was the principle behind the supreme courts ruling in brown vs board of education

The principle in Brown vs Board of Education was that "separate but equal" facilities violated the 14th Amendment. The "separate but equal" facilities that African Americans were put into was not really equal and therefore broke the 14th amendment.

there has only been 12 presidents. the 12th president is/was moon jae-in

ba geologist finds four sedimentary rock she determines that no geologic events have shifted the layers she labeles them a,b,c,dbfrom top to bottom