The phrase "rational basis" refers to a logical or reasonable justification for a decision or action. It means that there is a sensible or valid reason behind something. Full definition
We currently have little rational basis for saying that a particular school is a good school or that a particular superintendent is a good superintendent. (educationnext.org)
As such, the courts have applied rational basis scrutiny to the federal government's immigration policy. (law.stackexchange.com)
And as we all know, a lot of decisions are not made on a purely rational basis but on the decision maker's intuition and experience. (smallbusinessesdoitbetter.com)