nonce-wd. [The phr. (I) think so (THINK v.2 9 c) used as a sb.) A mere opinion.
1666. Bunyan, Grace Ab., § 97. How if all our Faith, and Christ, and Scriptures, should be but a Think-so too? Ibid. (1675), Saved by Grace, Wks. (1692), I. 568/1. He thinks former encouragements were Fancies, Delusions or meer Think-sos.
1887. Hall Caine, Deemster, xxxix. All the dread I had felt hitherto was no more than a thinkso.