• The experiment seemed to effectively rule out the alternative hypothesis.
• Experimental results argued against ( or were at variance with ) this conclusion.
• This finding demolished ( or toppled ) the boundwater hypothesis in its original form.
• This invalidates the assumption of constant fluid density.
• The discovery of radioactivity in 1896 dispelled the belief that all atoms are permanent and immutable.
• This refutes the assumption that rivers flowing through the more arid regions carry the most salt.