Historians (Marxists) claim that Rig Vedic Sarasvati is an imaginary river born out of minds of Rig Vedic Rishis, because there is no physical evidence of this river as Yamuna has.
We, the adherent of Hinduism blissfully forgot the route of ancient Sarasvati and made people to believe that it flows underground and meets Yamuna and Ganga at Allahabad (Prayag), until the satellite imagery indicated that a huge river has paleo-channel passing through Harayana, Rajsthan and Gujarat, and it might be the ancient Sarasvati. We have not maintained a single religious place as a memorial of that great river of which we claim to be descendent. What a lapse!
Our scriptures depict Sarasvati as a revered river and as goddess the wife of Brahma.But Rig Veda is categorical in agreement with satellite imagery as stated in RV.7.95.2
eko cetat sarasvati nadinam suciryati giribhyam aa samudrAt-
The only river we think is Sarasvati that cleanses from mountain upto sea.
Now my question is - In Hinduism what form of Sarasvati came first as a river or a goddess. From dogmatic religious point of view Brahma is Creator and Sarasvati is his wife, logically river is created lateron. From rational point of view Rig Veda is the source of all later scriptures and it depicts Sarasvati as river and it is later religious development that a river is symbolised as goddess.