A "plausible argument" refers to a statement or reasoning that appears logical and credible, making it possible to believe or accept as true. Full definition
But is does seem like this policy is being advocated by some reasonable - sounding people with plausible arguments and it does seem to have a respectable intellectual roots. (firstthings.com)
Since we are confronted with two plausible arguments leading to opposite conclusions, the only rational response is to admit our ignorance. (edge.org)
The most plausible argument for the static interpretation is the relativization of simultaneity and succession. (religion-online.org)